+
+
+
+
+
+
+
+
#######
+#######
+####### Replication files for Do Women Officers Police Differently? Evidence from Traffic Stops
+####### This file cleans the raw data and runs the analysis for the body of the paper.
+####### Last Updated: Jan. 2021
+#######
+#######
+
+
+###
+### 1. Setting up the space.
+###
+
+# Setting the working directory:
+setwd("~/Desktop/PinkPolicing/AJPS_ReplicationFiles")
+
+# Installing the needed libraries:
+#install.packages("pscl",dependencies = T)
+#install.packages("ggplot2",dependencies = T)
+#install.packages("texreg",dependencies = T)
+#install.packages("readr",dependencies = T)
+#install.packages("arm",dependencies = T)
+#install.packages("dplyr",dependencies = T)
+
+# Opening up those libraries:
+library(dplyr)
+
##
+## Attaching package: 'dplyr'
+
## The following objects are masked from 'package:stats':
+##
+## filter, lag
+
## The following objects are masked from 'package:base':
+##
+## intersect, setdiff, setequal, union
+
library(ggplot2)
+library(texreg)
+
## Version: 1.37.5
+## Date: 2020-06-17
+## Author: Philip Leifeld (University of Essex)
+##
+## Consider submitting praise using the praise or praise_interactive functions.
+## Please cite the JSS article in your publications -- see citation("texreg").
+
library(readr)
+library(pscl)
+
## Classes and Methods for R developed in the
+## Political Science Computational Laboratory
+## Department of Political Science
+## Stanford University
+## Simon Jackman
+## hurdle and zeroinfl functions by Achim Zeileis
+
library(arm)
+
## Loading required package: MASS
+
##
+## Attaching package: 'MASS'
+
## The following object is masked from 'package:dplyr':
+##
+## select
+
## Loading required package: Matrix
+
## Loading required package: lme4
+
##
+## arm (Version 1.11-2, built: 2020-7-27)
+
## Working directory is /Users/kelseyshoub/Desktop/PinkPolicing/AJPS_ReplicationFiles
+
# Loading the raw data:
+nc_new = read_csv("Data/Officer_Traffic_Stops_Update.csv")
+
##
+## ── Column specification ────────────────────────────────────────────────────────────────────────────────────
+## cols(
+## OBJECTID = col_double(),
+## Month_of_Stop = col_character(),
+## Reason_for_Stop = col_character(),
+## Officer_Race = col_character(),
+## Officer_Gender = col_character(),
+## Officer_Years_of_Service = col_double(),
+## Driver_Race = col_character(),
+## Driver_Ethnicity = col_character(),
+## Driver_Gender = col_character(),
+## Driver_Age = col_double(),
+## Was_a_Search_Conducted = col_character(),
+## Result_of_Stop = col_character(),
+## CMPD_Division = col_character(),
+## GlobalID = col_character()
+## )
+
nc_old = read_csv("Data/Officer_Traffic_Stops_Original.csv")
+
##
+## ── Column specification ────────────────────────────────────────────────────────────────────────────────────
+## cols(
+## Month_of_Stop = col_character(),
+## Reason_for_Stop = col_character(),
+## Officer_Race = col_character(),
+## Officer_Gender = col_character(),
+## Officer_Years_of_Service = col_double(),
+## Driver_Race = col_character(),
+## Driver_Ethnicity = col_character(),
+## Driver_Gender = col_character(),
+## Driver_Age = col_double(),
+## Was_a_Search_Conducted = col_character(),
+## Result_of_Stop = col_character(),
+## CMPD_Division = col_character(),
+## ObjectID = col_double(),
+## CreationDate = col_datetime(format = ""),
+## Creator = col_character(),
+## EditDate = col_datetime(format = ""),
+## Editor = col_character()
+## )
+
nc = bind_rows(nc_new,nc_old)
+fl = read_csv("Data/fl_statewide_2019_08_13.csv")
+
##
+## ── Column specification ────────────────────────────────────────────────────────────────────────────────────
+## cols(
+## .default = col_character(),
+## date = col_date(format = ""),
+## time = col_time(format = ""),
+## subject_age = col_double(),
+## officer_age = col_double(),
+## officer_years_of_service = col_double(),
+## arrest_made = col_logical(),
+## citation_issued = col_logical(),
+## warning_issued = col_logical(),
+## frisk_performed = col_logical(),
+## search_conducted = col_logical()
+## )
+## ℹ Use `spec()` for the full column specifications.
+
###
+### 2. Producing the data sets for each table.
+###
+
+# Cleaning the NC Data
+nc$driver_re = as.numeric(ifelse(nc$Driver_Race=="White"&
+ nc$Driver_Ethnicity=="Non-Hispanic","0",
+ ifelse(nc$Driver_Race=="Black"&
+ nc$Driver_Ethnicity=="Non-Hispanic","1",
+ ifelse(nc$Driver_Ethnicity=="Hispanic","2",NA))))
+nc$of_rg = ifelse(nc$Officer_Race=="White",
+ ifelse(nc$Officer_Gender=="Male","0","1"),
+ ifelse(nc$Officer_Race=="Black/African American",
+ ifelse(nc$Officer_Gender=="Male","2","3"),NA))
+nc$of_race = ifelse(nc$Officer_Race=="White",0,
+ ifelse(nc$Officer_Race=="Black/African American",1,NA))
+nc$of_gender = ifelse(nc$Officer_Gender=="Male","0","1")
+nc$investigatory = ifelse(grepl("Impaired|Speeding|Light|Movement",
+ as.character(nc$Reason_for_Stop)),0,1)
+nc$investigatory = ifelse(grepl("Check",as.character(nc$Reason_for_Stop)),
+ NA,nc$investigatory)
+nc$race_gender = ifelse(nc$driver_re=="0",
+ ifelse(nc$Driver_Gender=="Male","0","1"),
+ ifelse(nc$driver_re=="1",
+ ifelse(nc$Driver_Gender=="Male","2","3"),NA))
+nc$search = ifelse(nc$Was_a_Search_Conducted=="Yes",1,0)
+
+nc$subject_sex = tolower(nc$Driver_Gender)
+nc$subject_age = nc$Driver_Age
+nc$officer_sex = tolower(nc$Officer_Gender)
+nc$month = apply(as.matrix(as.character(nc$Month_of_Stop)),1,
+ function(x){strsplit(x,"/",fixed=T)[[1]][2]})
+nc$year = apply(as.matrix(as.character(nc$Month_of_Stop)),1,
+ function(x){strsplit(x,"/",fixed=T)[[1]][1]})
+
+nc$arrest = ifelse(nc$Result_of_Stop=="Arrest",1,0)
+save(nc,file="Data/NorthCarolina.RData")
+
+# Cleaning the FL data.
+violations_list = strsplit(paste(fl$reason_for_stop,collapse = "|"),"|",fixed = T)
+violations_list_small = unique(violations_list[[1]])[2:71]
+violations_indicator = violations_list_small[c(1,2,5,6,7,9,10,14,19,
+ 20,23,40,45)]
+fl$investigatory = ifelse(is.na(fl$violation),NA,
+ ifelse(fl$violation %in% violations_indicator, 0, 1))
+fl$contraband_found = ifelse(grepl("contraband",
+ tolower(fl$violation)),1,0)
+fl$race_gender = ifelse(fl$subject_race=="white",
+ ifelse(fl$subject_sex=="male",0,1),
+ ifelse(fl$subject_race=="black",
+ ifelse(fl$subject_sex=="male",2,3),
+ ifelse(fl$subject_race=="hispanic",
+ ifelse(fl$subject_sex=="male",4,5),NA)))
+fl$of_rg = ifelse(fl$officer_race=="white",
+ ifelse(fl$officer_sex=="male",0,1),
+ ifelse(fl$officer_race=="black",
+ ifelse(fl$officer_sex=="male",2,3),
+ ifelse(fl$officer_race=="hispanic",
+ ifelse(fl$officer_sex=="male",4,5),NA)))
+fl$of_race = ifelse(fl$officer_race=="white",0,
+ ifelse(fl$officer_race=="black",1,
+ ifelse(fl$officer_race=="hispanic",2,
+ ifelse(fl$officer_race=="asian/pacific islander",3,
+ ifelse(fl$officer_race=="other",4,NA)))))
+fl$of_gender = ifelse(fl$officer_sex=="male",0,1)
+fl$out_of_state = ifelse(fl$vehicle_registration_state=="FL",0,1)
+fl$hour_of_day = apply(as.matrix(as.character(fl$time)),1,
+ function(x)(strsplit(x,":",fixed = T)[[1]][1]))
+fl$month = apply(as.matrix(as.character(fl$date)),1,
+ function(x)(paste(strsplit(x,"-",fixed = T)[[1]][2],
+ collapse = "_")))
+fl$year = apply(as.matrix(as.character(fl$date)),1,
+ function(x)(paste(strsplit(x,"-",fixed = T)[[1]][1],
+ collapse = "_")))
+fl = subset(fl,fl$year!="2016"&fl$year!="2017"&fl$year!="2018") #Narrows down to complete years that don't report extreme misingness on key outcome.
+fl.officers = names(table(fl$officer_id_hash))[table(fl$officer_id_hash)>1000]
+fl$officers_include = ifelse(fl$officer_id_hash%in%fl.officers,1,0)
+fl.counties = names(table(fl$county_name))[table(fl$county_name)>1000]
+fl$county_include = ifelse(fl$county_name%in%fl.counties,1,0)
+fl.ag.id = aggregate(fl$of_gender,
+ list(fl$officer_id_hash,fl$year,fl$county_name),
+ mean)
+fl.ag.id$officer = ifelse(!is.na(fl.ag.id$x),1,0)
+fl.ag.gender = aggregate(fl.ag.id[,c("x","officer")],
+ list(fl.ag.id$Group.2,fl.ag.id$Group.3),
+ sum,na.rm=T)
+fl.ag.gender$prop.female = fl.ag.gender$x/fl.ag.gender$officer
+colnames(fl.ag.gender) = c("year","county_name","count.female","tot.officer","prop.female")
+fl = merge(fl,fl.ag.gender,by=c("year","county_name"),all.x=T)
+fl$officer_exclude = ifelse(fl$officer_years_of_service<0|fl$officer_years_of_service>40,1,0)
+fl.ag.id2 = aggregate(fl$of_gender,
+ list(fl$officer_id_hash),
+ mean)
+fl$search_occur = ifelse(fl$search_conducted == 0, 0,
+ ifelse(fl$search_basis != "other",1,NA))
+fl$contra = ifelse(is.na(fl$search_occur),0,
+ ifelse(fl$search_occur==1,fl$contraband_found,0))
+
+complete = complete.cases(fl[,c("search_occur","race_gender","subject_age",
+ "out_of_state","investigatory","of_gender",
+ "of_race","officer_years_of_service","officer_age",
+ "hour_of_day","month","year","county_name")])
+fl.sm = fl[complete,]
+complete2 = complete.cases(fl[,c("search_occur","of_gender")])
+table(complete)
+
## complete
+## FALSE TRUE
+## 2111746 2731204
+
table(complete2)
+
## complete2
+## FALSE TRUE
+## 692067 4150883
+
fl.missingness = apply(fl[,c("search_occur","race_gender","subject_age",
+ "out_of_state","investigatory","of_gender",
+ "of_race","officer_years_of_service","officer_age",
+ "county_name")],
+ 2,
+ FUN = function(x){table(is.na(x))})
+save(fl,file="Data/FloridaLarge.RData")
+save(fl.sm,file="Data/FloridaSmall.RData")
+
+fl$stops = ifelse(!is.na(fl$search_occur),1,0)
+fl$contra.ttest = ifelse(fl$search_occur==1,fl$contra,NA)
+prop.test(table(fl$of_gender,fl$contra.ttest))
+
##
+## 2-sample test for equality of proportions with continuity correction
+##
+## data: table(fl$of_gender, fl$contra.ttest)
+## X-squared = 16.681, df = 1, p-value = 4.423e-05
+## alternative hypothesis: two.sided
+## 95 percent confidence interval:
+## 0.05554105 0.17724120
+## sample estimates:
+## prop 1 prop 2
+## 0.7009499 0.5845588
+
fl$of_exper = ifelse(fl$officer_years_of_service>=
+ mean(fl$officer_years_of_service,na.rm=T),1,0)
+fl$of_age = ifelse(fl$officer_age<30,1,
+ ifelse(fl$officer_age>64,3,2))
+fl$driver_age = ifelse(fl$subject_age<30,1,
+ ifelse(fl$subject_age>64,3,2))
+fl$hour_of_day2 = as.numeric(fl$hour_of_day)
+fl$tod = ifelse(fl$hour_of_day2<3,1,
+ ifelse(fl$hour_of_day2<6,2,
+ ifelse(fl$hour_of_day2<9,3,
+ ifelse(fl$hour_of_day2<12,4,
+ ifelse(fl$hour_of_day2<15,5,
+ ifelse(fl$hour_of_day2<18,6,
+ ifelse(fl$hour_of_day2<21,7,8)))))))
+
+fl.ag.officers = aggregate(fl[,c("stops","search_occur","contra")],
+ by=list(fl$officer_id_hash,
+ fl$of_race,fl$of_gender,
+ fl$of_exper,fl$of_age,
+ fl$race_gender,fl$driver_age,
+ fl$out_of_state,fl$investigatory,
+ fl$year,fl$tod),
+ sum,na.rm=T)
+colnames(fl.ag.officers) = c("officer_id","of_race","of_gender","of_exper",
+ "of_age","race_gender","driver_age",
+ "out_of_state","investigatory","year",
+ "tod","stops","search_occur","contra")
+fl.ag.officers$contra.search.rate = (fl.ag.officers$contra/fl.ag.officers$search_occur)*10
+fl.ag.officers$contra.stop.rate = (fl.ag.officers$contra/fl.ag.officers$stops)*100
+save(fl.ag.officers,file="Data/FL_Aggregated.RData")
+
+# Data for Figure 1
+search.df = data.frame("Department" = c("CPD","CPD","FHP","FHP"),
+ "Gender" = c("Male","Female","Male","Female"),
+ "Rate" = c(prop.table(table(nc$of_gender,nc$search),1)[,2],
+ prop.table(table(fl$of_gender[fl.sm$county_include==1&
+ fl.sm$officer_exclude==0],
+ fl$search_occur[fl.sm$county_include==1&
+ fl.sm$officer_exclude==0]),1)[,2]))
+save(search.df,file="Data/Fig1_Data.RData")
+
+###
+### 3. Regressions
+###
+
+#
+# For the Main Text:
+#
+
+# Search Regressions
+fl.search.sm = lm(search_occur~factor(of_gender),data=fl)
+save(fl.search.sm, file="Data/FLSearch_Sm_OLS.RData")
+fl.search = lm(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0)
+save(fl.search,file="Data/FLSearch_OLS.RData")
+nc.search.sm = lm(search~factor(of_gender),data = nc)
+save(nc.search.sm,file="Data/NCSearch_Sm_OLS.RData")
+nc.search = lm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+factor(year)+
+ factor(CMPD_Division),
+ data=nc)
+save(nc.search,file="Data/NCSearch_OLS.RData")
+
+# Contraband Regressions
+fl.contra = lm(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0)
+save(fl.contra,file="Data/FlContra_OLS.RData")
+contra.search.rate.reg = lm(contra.search.rate ~ factor(of_gender) + factor(of_exper) +
+ factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year)+factor(tod),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$search_occur>0)
+save(contra.search.rate.reg,file="Data/FlSearchRate_OLS.RData")
+contra.stop.rate.reg = lm(contra.stop.rate ~ factor(of_gender) + factor(of_exper) +
+ factor(of_age) + factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year)+factor(tod),
+ data=fl.ag.officers)
+save(contra.stop.rate.reg,file="Data/FlStopRate_OLS.RData")
+
+
+
+
+
+
+
+
+
+
+
+
+
#######
+#######
+####### Replication files for Do Women Officers Police Differently? Evidence from Traffic Stops
+####### This file runs most of the supplemental regressions shown in the appendix.
+####### Last Updated: Jan. 2021
+#######
+#######
+
+# Opening up those libraries:
+library(dplyr)
+
##
+## Attaching package: 'dplyr'
+
## The following objects are masked from 'package:stats':
+##
+## filter, lag
+
## The following objects are masked from 'package:base':
+##
+## intersect, setdiff, setequal, union
+
library(ggplot2)
+library(texreg)
+
## Version: 1.37.5
+## Date: 2020-06-17
+## Author: Philip Leifeld (University of Essex)
+##
+## Consider submitting praise using the praise or praise_interactive functions.
+## Please cite the JSS article in your publications -- see citation("texreg").
+
library(readr)
+library(pscl)
+
## Classes and Methods for R developed in the
+## Political Science Computational Laboratory
+## Department of Political Science
+## Stanford University
+## Simon Jackman
+## hurdle and zeroinfl functions by Achim Zeileis
+
library(arm)
+
## Loading required package: MASS
+
##
+## Attaching package: 'MASS'
+
## The following object is masked from 'package:dplyr':
+##
+## select
+
## Loading required package: Matrix
+
## Loading required package: lme4
+
##
+## arm (Version 1.11-2, built: 2020-7-27)
+
## Working directory is /Users/kelseyshoub/Desktop/PinkPolicing/AJPS_ReplicationFiles/ReplicationCode
+
# Setting the working directory:
+setwd("~/Desktop/PinkPolicing/AJPS_ReplicationFiles")
+
+#
+# Appendix: Alternative Specifications
+#
+
+# Clearing the workspace.
+rm(list = ls())
+
+# Loading in the Data
+load("Data/FloridaSmall.RData")
+load("Data/FL_Aggregated.RData")
+
+# FE for Officer
+fl.search = lmer(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name)+(1|officer_id_hash),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0)
+save(fl.search,file="Data/FLSearch_OLS_FE.RData")
+fl.contra = lmer(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+factor(county_name)+
+ (1|officer_id_hash),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0)
+save(fl.contra,file="Data/FlContra_OLS_FE.RData")
+contra.search.rate.reg = lmer(contra.search.rate ~ factor(of_gender) + factor(of_exper) +
+ factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year)+factor(tod)+
+ (1|officer_id),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$search_occur>0)
+save(contra.search.rate.reg,file="Data/FlSearchRate_OLS_FE.RData")
+contra.stop.rate.reg = lmer(contra.stop.rate ~ factor(of_gender) + factor(of_exper) +
+ factor(of_age) + factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year)+factor(tod)+(1|officer_id),
+ data=fl.ag.officers)
+save(contra.stop.rate.reg,file="Data/FlStopRate_OLS_FE.RData")
+
+# Logistc Regressions
+rm(list = ls())
+
+load("Data/NorthCarolina.RData")
+load("Data/FloridaSmall.RData")
+
+fl.search = glm(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,family="binomial",
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0)
+save(fl.search,file="Data/FLSearch_Logit.RData")
+nc.search = glm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+factor(year)+
+ factor(CMPD_Division),
+ family="binomial",
+ data=nc)
+save(nc.search,file="Data/NCSearch_Logit.RData")
+fl.contra = glm(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm, family = "binomial",
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0)
+save(fl.contra,file="Data/FlContra_Logit.RData")
+
+
+#
+# Appendix: Interaction Models
+#
+
+rm(list = ls())
+
+load("Data/NorthCarolina.RData")
+load("Data/FloridaSmall.RData")
+load("Data/FloridaLarge.RData")
+load("Data/FL_Aggregated.RData")
+
+
+# Experience
+fl.search.exper = lm(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+factor(of_race)+
+ factor(of_gender)*officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0)
+save(fl.search.exper,file="Data/FLSearch_Exper_OLS.RData")
+nc.search.exper = lm(search~factor(race_gender)+subject_age+
+ investigatory+factor(of_race)+
+ factor(of_gender)*Officer_Years_of_Service+
+ factor(month)+factor(year)+
+ factor(CMPD_Division),
+ data=nc)
+save(nc.search.exper,file="Data/NCSearch_Exper_OLS.RData")
+fl.contra.exper = lm(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+factor(of_gender)*officer_years_of_service+
+ factor(of_race)+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0)
+save(fl.contra.exper,file="Data/FlContra_Exper_OLS.RData")
+contra.search.rate.exper = lm(contra.search.rate ~ factor(of_gender)*factor(of_exper) +
+ investigatory+factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ out_of_state +
+ factor(year),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$search_occur>0)
+save(contra.search.rate.exper,file="Data/FlSearchRate_Exper_OLS.RData")
+contra.stop.rate.exper = lm(contra.stop.rate ~ factor(of_gender)*factor(of_exper) +
+ investigatory+
+ factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ out_of_state +
+ factor(year),
+ data=fl.ag.officers)
+save(contra.stop.rate.exper,file="Data/FlStopRate_Exper_OLS.RData")
+
+# Prop Female
+fl$male.officer = ifelse(fl$of_gender==1,0,1)
+fl.ag = aggregate(fl$officer_id_hash,
+ by=list(fl$of_gender,fl$county_name,fl$year),
+ function(x){length(unique(x))})
+fl.ag.m = fl.ag[fl.ag$Group.1==0,]
+fl.ag.f = fl.ag[fl.ag$Group.1==1,]
+colnames(fl.ag.m)=c("male","county_name","year","male.count")
+colnames(fl.ag.f)=c("female","county_name","year","female.count")
+fl.ag = merge(fl.ag.m,fl.ag.f,all=T)
+fl.ag$male.count[is.na(fl.ag$male.count)] = 0
+fl.ag$female.count[is.na(fl.ag$female.count)] = 0
+fl.ag$female.prop = fl.ag$female.count/(fl.ag$female.count+fl.ag$male.count)
+summary(fl.ag$female.prop)
+
## Min. 1st Qu. Median Mean 3rd Qu. Max.
+## 0.00000 0.05042 0.07937 0.08078 0.10526 1.00000
+
fl.sm = merge(fl.sm,fl.ag)
+fl.search.prop = lm(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+factor(of_race)+
+ factor(of_gender)*female.prop+officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0)
+save(fl.search.prop,file="Data/FLSearch_Prop_OLS.RData")
+fl.contra.prop = lm(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ investigatory+factor(of_gender)*female.prop+
+ officer_years_of_service+
+ factor(of_race)+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0)
+save(fl.contra.prop,file="Data/FlContra_Prop_OLS.RData")
+
+# Stop Type
+fl.search.st = lm(search_occur~factor(race_gender)+
+ subject_age+out_of_state+
+ factor(of_gender)+factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&fl.sm$officer_exclude==0&
+ fl.sm$investigatory==1)
+save(fl.search.st,file="Data/FLSearch_StopType_OLS.RData")
+nc.search.st = lm(search~factor(race_gender)+subject_age+
+ factor(of_gender)+
+ factor(of_race)+Officer_Years_of_Service+
+ factor(month)+factor(year)+
+ factor(CMPD_Division),
+ data=nc,
+ subset = nc$investigatory==1)
+save(nc.search.st,file="Data/NCSearch_StopType_OLS.RData")
+fl.contra.st = lm(contra~factor(race_gender)+
+ subject_age+out_of_state+
+ factor(of_gender)+
+ factor(of_race)+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$search_occur==1&
+ fl.sm$officer_exclude==0&
+ fl.sm$investigatory==1)
+save(fl.contra.st,file="Data/FlContra_StopType_OLS.RData")
+contra.search.rate.st = lm(contra.search.rate ~ factor(of_gender)+
+ factor(of_exper) +
+ factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ out_of_state +
+ factor(year),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$search_occur>0&
+ fl.ag.officers$investigatory==1)
+save(contra.search.rate.st,file="Data/FlSearchRate_StopType_OLS.RData")
+contra.stop.rate.st = lm(contra.stop.rate ~ factor(of_gender)+
+ factor(of_exper) +
+ factor(of_age) +factor(of_race) +
+ factor(race_gender) + factor(driver_age)+
+ out_of_state +
+ factor(year),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$investigatory==1)
+save(contra.stop.rate.st,file="Data/FlStopRate_StopType_OLS.RData")
+
+# Driver Characteristics
+fl.sm$subject_female = ifelse(fl.sm$subject_sex=="female",1,0)
+fl.sm$subject_race2 = ifelse(fl.sm$subject_race=="white",0,
+ ifelse(fl.sm$subject_race=="black",1,2))
+fl.search.inter = lm(search_occur~factor(of_gender)*factor(subject_female)+
+ factor(of_race)*factor(subject_race2)+
+ subject_age+out_of_state+investigatory+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$county_include==1&
+ fl.sm$officer_exclude==0&
+ as.numeric(fl.sm$of_race)<3)
+save(fl.search.inter,file="Data/FLInter_Search.RData")
+fl.contra.inter = lm(contra~factor(of_gender)*factor(subject_female)+
+ factor(of_race)*factor(subject_race2)+
+ subject_age+out_of_state+investigatory+
+ officer_years_of_service+officer_age+
+ factor(hour_of_day)+factor(month)+factor(year)+
+ factor(county_name),
+ data=fl.sm,
+ subset=fl.sm$search_occur==1&
+ fl.sm$county_include==1&
+ fl.sm$officer_exclude==0&
+ as.numeric(fl.sm$of_race)<3)
+save(fl.contra.inter,file="Data/FLInter_Contra.RData")
+fl.ag.officers$subject_female = ifelse(fl.ag.officers$race_gender%in%c(1,3,5),1,0)
+fl.ag.officers$subject_race2 = ifelse(fl.ag.officers$race_gender%in%c(0,1),0,
+ ifelse(fl.ag.officers$race_gender%in%c(2,3),1,2))
+contra.search.rate.inter = lm(contra.search.rate ~ factor(of_gender)*factor(subject_female) +
+ factor(of_race) * factor(subject_race2)+
+ factor(of_exper) + factor(of_age) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year),
+ data=fl.ag.officers,
+ subset=fl.ag.officers$search_occur>0)
+save(contra.search.rate.inter,file="Data/FlSearchRate_Inter_OLS.RData")
+contra.stop.rate.inter = lm(contra.stop.rate ~ factor(of_gender)*factor(subject_female) +
+ factor(of_race) * factor(subject_race2)+
+ factor(of_exper) + factor(of_age) +
+ factor(race_gender) + factor(driver_age)+
+ investigatory + out_of_state +
+ factor(year),
+ data=fl.ag.officers)
+save(contra.stop.rate.inter,file="Data/FlStopRate_Inter_OLS.RData")
+
+nc$of_race = ifelse(nc$Officer_Race=="White",0,
+ ifelse(nc$Officer_Race=="Black/African American",1,
+ ifelse(nc$Officer_Race=="Hispanic/Latino",2,NA)))
+nc$subject_female = ifelse(nc$Driver_Gender=="Female",1,0)
+nc$subject_race2 = ifelse(nc$Driver_Race=="White"&
+ nc$Driver_Ethnicity=="Non-Hispanic",0,
+ ifelse(nc$Driver_Race=="Black"&
+ nc$Driver_Ethnicity=="Non-Hispanic",1,
+ ifelse(nc$Driver_Ethnicity=="Hispanic",2,NA)))
+nc.search.inter = lm(search~factor(of_gender)*factor(subject_female)+
+ factor(of_race)*factor(subject_race2)+
+ subject_age+investigatory+
+ Officer_Years_of_Service+
+ factor(month)+factor(year)+
+ factor(CMPD_Division),
+ data=nc)
+save(nc.search.inter,file = "Data/NCInter_Search.RData")
+
+
+
+
+
+
+
+
+
+
+
+
+
#######
+#######
+####### Replication files for Do Women Officers Police Differently? Evidence from Traffic Stops
+####### This file produces the tables and figures seen in the paper and appendix.
+####### Last Updated: Jan. 2021
+#######
+#######
+
+###
+### 1. Setting up the space.
+###
+
+# Setting the working directory:
+setwd("~/Desktop/PinkPolicing/AJPS_ReplicationFiles")
+
+# Installing the needed libraries:
+#install.packages("pscl",dependencies = T)
+#install.packages("ggplot2",dependencies = T)
+#install.packages("texreg",dependencies = T)
+#install.packages("readr",dependencies = T)
+#install.packages("arm",dependencies = T)
+
+# Opening up those libraries:
+library(ggplot2)
+library(texreg)
+
## Version: 1.37.5
+## Date: 2020-06-17
+## Author: Philip Leifeld (University of Essex)
+##
+## Consider submitting praise using the praise or praise_interactive functions.
+## Please cite the JSS article in your publications -- see citation("texreg").
+
library(readr)
+library(pscl)
+
## Classes and Methods for R developed in the
+## Political Science Computational Laboratory
+## Department of Political Science
+## Stanford University
+## Simon Jackman
+## hurdle and zeroinfl functions by Achim Zeileis
+
library(arm)
+
## Loading required package: MASS
+
## Loading required package: Matrix
+
## Loading required package: lme4
+
##
+## arm (Version 1.11-2, built: 2020-7-27)
+
## Working directory is /Users/kelseyshoub/Desktop/PinkPolicing/AJPS_ReplicationFiles
+
###
+### 2. Body of the Paper
+###
+
+# Clearing the workspace + reading in data bit by bit to produce each table and figure.
+rm(list = ls())
+
+# Loading in the Data
+load("Data/NorthCarolina.RData")
+load("Data/FloridaLarge.RData")
+load("Data/FloridaSmall.RData")
+cmpd.employee = read_csv("Data/CMPD_Employee_Demographics.csv")
+
##
+## ── Column specification ──────────────────────────────────────────────────────
+## cols(
+## JOB_TITLE = col_character(),
+## Years_Of_Service = col_double(),
+## Age = col_double(),
+## Gender = col_character(),
+## Race = col_character(),
+## ObjectID = col_double()
+## )
+
# Number of stops and searches by sex:
+dim(fl)
+
## [1] 4842950 52
+
dim(nc)
+
## [1] 218158 32
+
table(fl$search_occur)
+
##
+## 0 1
+## 4391272 17356
+
table(nc$search)
+
##
+## 0 1
+## 207714 10444
+
prop.table(table(fl$search_occur))
+
##
+## 0 1
+## 0.996063174 0.003936826
+
prop.table(table(nc$search))
+
##
+## 0 1
+## 0.95212644 0.04787356
+
table(fl$of_gender)
+
##
+## 0 1
+## 3870641 291604
+
table(nc$of_gender)
+
##
+## 0 1
+## 199234 18924
+
table(fl$of_gender,fl$search_occur)
+
##
+## 0 1
+## 0 3843369 16422
+## 1 290820 272
+
table(nc$of_gender,nc$search)
+
##
+## 0 1
+## 0 189611 9623
+## 1 18103 821
+
prop.table(table(fl$of_gender,fl$search_occur),1)
+
##
+## 0 1
+## 0 0.9957453655 0.0042546345
+## 1 0.9990655875 0.0009344125
+
prop.table(table(nc$of_gender,nc$search),1)
+
##
+## 0 1
+## 0 0.95170001 0.04829999
+## 1 0.95661594 0.04338406
+
table(fl$of_gender,fl$contra)
+
##
+## 0 1
+## 0 3865730 4911
+## 1 291491 113
+
# Number of officers by sex in FL
+length(unique(fl$officer_id_hash))
+
## [1] 2708
+
length(unique(fl$officer_id_hash[fl$of_gender==0]))
+
## [1] 1916
+
length(unique(fl$officer_id_hash[fl$of_gender==1]))
+
## [1] 244
+
length(unique(fl$officer_id_hash[fl$officer_exclude==0]))
+
## [1] 2338
+
length(unique(fl$officer_id_hash[fl$of_gender==0&fl$officer_exclude==0]))
+
## [1] 1910
+
length(unique(fl$officer_id_hash[fl$of_gender==1&fl$officer_exclude==0]))
+
## [1] 244
+
table(cmpd.employee$JOB_TITLE[cmpd.employee$JOB_TITLE=="Police Officer"])
+
##
+## Police Officer
+## 1540
+
sum(table(cmpd.employee$Gender[cmpd.employee$JOB_TITLE=="Police Officer"]))
+
## [1] 1540
+
table(fl$year)
+
##
+## 2010 2011 2012 2013 2014 2015
+## 675487 870349 748026 830791 922008 796289
+
(table(fl$of_gender)/c(length(unique(fl$officer_id_hash[fl$of_gender==0&fl$officer_exclude==0])),length(unique(fl$officer_id_hash[fl$of_gender==1&fl$officer_exclude==0]))))/6
+
##
+## 0 1
+## 337.7523 199.1831
+
avg.stops = aggregate(fl$year,by=list(fl$officer_id_hash,fl$year,fl$of_gender),length)
+summary(avg.stops)
+
## Group.1 Group.2 Group.3 x
+## Length:9319 Length:9319 Min. :0.0000 Min. : 1.0
+## Class :character Class :character 1st Qu.:0.0000 1st Qu.: 125.0
+## Mode :character Mode :character Median :0.0000 Median : 359.0
+## Mean :0.1062 Mean : 446.6
+## 3rd Qu.:0.0000 3rd Qu.: 649.0
+## Max. :1.0000 Max. :5299.0
+
mean(avg.stops$x)
+
## [1] 446.6407
+
median(avg.stops$x[avg.stops$Group.3==0])
+
## [1] 380
+
median(avg.stops$x[avg.stops$Group.3==1])
+
## [1] 202.5
+
prop.table(table(fl$investigatory[fl$of_gender==0]))
+
##
+## 0 1
+## 0.4649428 0.5350572
+
prop.table(table(fl$investigatory[fl$of_gender==1]))
+
##
+## 0 1
+## 0.4334131 0.5665869
+
table(nc$of_gender[nc$year==2019])[2:1]/table(cmpd.employee$Gender[cmpd.employee$JOB_TITLE=="Police Officer"])
+
##
+## 1 0
+## 33.13750 68.11154
+
# Excluding Cases:
+dim(nc)
+
## [1] 218158 32
+
dim(nc)-dim(nc[!is.na(nc$search),])
+
## [1] 0 0
+
dim(fl)
+
## [1] 4842950 52
+
dim(fl)-dim(fl[!is.na(fl$search_occur),])
+
## [1] 434322 0
+
(dim(fl[!is.na(fl$search_occur),])-dim(fl.sm))+table(fl.sm$officer_exclude)[2]
+
## [1] 1695594 18170
+
table(fl.sm$county_include)
+
##
+## 0 1
+## 556 2730648
+
# Table 1
+tab1 = data.frame("Department"=c("Charlotte PD (NC)",
+ "Male Officers","Female Officers",
+ "Florida Highwar Patrol",
+ "Male Officers","Female Officers"),
+ "Type"=c("Municipal","","","Statewide","",""),
+ "Years"=c("2016-2017","","",
+ "2010-2015","",""),
+ "Stops"=c(dim(nc)[1],table(nc$of_gender),
+ dim(fl[!is.na(fl$search_occur),])[1],
+ table(fl$of_gender[!is.na(fl$search_occur)])),
+ "Searches"=c(table(nc$search)[2],table(nc$of_gender,nc$search)[,2],
+ table(fl$search_occur)[2],
+ table(fl$of_gender,fl$search_occur)[,2]),
+ "Search Rate"=c(table(nc$search)[2]/dim(nc)[1],
+ table(nc$of_gender,nc$search)[,2]/table(nc$of_gender),
+ table(fl$search_occur)[2]/dim(fl[!is.na(fl$search_occur),])[1],
+ table(fl$of_gender,fl$search_occur)[,2]/
+ table(fl$of_gender[!is.na(fl$search_occur)])))
+tab1 = rbind(tab1,
+ c("Total","","",
+ sum(tab1[c(1,4),4]),sum(tab1[c(1,4),5]),
+ sum(tab1[c(1,4),5])/sum(tab1[c(1,4),4])))
+tab1
+
## Department Type Years Stops Searches
+## 1 Charlotte PD (NC) Municipal 2016-2017 218158 10444
+## 2 Male Officers 199234 9623
+## 3 Female Officers 18924 821
+## 4 Florida Highwar Patrol Statewide 2010-2015 4408628 17356
+## 5 Male Officers 3859791 16422
+## 6 Female Officers 291092 272
+## 7 Total 4626786 27800
+## Search.Rate
+## 1 0.0478735595302487
+## 2 0.048299988957708
+## 3 0.0433840625660537
+## 4 0.0039368256972464
+## 5 0.00425463451259408
+## 6 0.000934412488148077
+## 7 0.00600849055910518
+
# Figure 1
+load("Data/Fig1_Data.RData")
+png("Figures/Fig1_PredProb.png",
+ 750,519)
+ggplot(data = search.df, aes(x=Department,y=Rate,fill=Gender)) +
+ geom_bar(stat="identity", position=position_dodge()) +
+ ylab("Search Rate") +
+ theme_bw(base_size=15)+
+ theme(legend.position = "bottom") +
+ labs(fill="Officer Sex")+
+ scale_fill_grey(start = 0.25, end = .75)
+dev.off()
+
## quartz_off_screen
+## 2
+
prop.test(table(fl$of_gender,fl$search_occur))
+
##
+## 2-sample test for equality of proportions with continuity correction
+##
+## data: table(fl$of_gender, fl$search_occur)
+## X-squared = 744.11, df = 1, p-value < 2.2e-16
+## alternative hypothesis: two.sided
+## 95 percent confidence interval:
+## -0.003450662 -0.003189782
+## sample estimates:
+## prop 1 prop 2
+## 0.9957454 0.9990656
+
prop.test(table(nc$of_gender,nc$search))
+
##
+## 2-sample test for equality of proportions with continuity correction
+##
+## data: table(nc$of_gender, nc$search)
+## X-squared = 9.0552, df = 1, p-value = 0.002619
+## alternative hypothesis: two.sided
+## 95 percent confidence interval:
+## -0.007996240 -0.001835613
+## sample estimates:
+## prop 1 prop 2
+## 0.9517000 0.9566159
+
# Table 2
+load("Data/FLSearch_Sm_OLS.RData")
+load("Data/FLSearch_OLS.RData")
+load("Data/NCSearch_Sm_OLS.RData")
+load("Data/NCSearch_OLS.RData")
+screenreg(list(nc.search,fl.search),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "investigatory" = "Investigatory Stop Purpose"),
+ custom.model.names = c("(1) NC Search",
+ "(2) FL Search"),
+ digits=4)
+
##
+## ===========================================================
+## (1) NC Search (2) FL Search
+## -----------------------------------------------------------
+## (Intercept) 0.0862 ** 0.0263 **
+## (0.0037) (0.0005)
+## Female Officer -0.0256 ** -0.0038 **
+## (0.0020) (0.0002)
+## Black Officer -0.0292 ** -0.0028 **
+## (0.0015) (0.0001)
+## White Female -0.0086 ** -0.0026 **
+## (0.0019) (0.0001)
+## Black Male 0.0465 ** 0.0066 **
+## (0.0016) (0.0001)
+## Black Female -0.0204 ** -0.0015 **
+## (0.0017) (0.0002)
+## Latino Male 0.0015 **
+## (0.0001)
+## Latina Female -0.0020 **
+## (0.0002)
+## Investigatory Stop Purpose 0.0285 ** 0.0055 **
+## (0.0012) (0.0001)
+## -----------------------------------------------------------
+## R^2 0.0713 0.0092
+## Adj. R^2 0.0711 0.0091
+## Num. obs. 150547 2712478
+## ===========================================================
+## ** p < 0.01; * p < 0.05
+
# Figure 2
+fl.of.pred = predict(fl.search,
+ newdata = data.frame("of_gender"=c(0,1),"race_gender"=0,
+ "subject_age"=35,"out_of_state"=0,
+ "investigatory"=1,
+ "officer_years_of_service"=6,
+ "of_race"=0,"officer_age"=39,
+ "hour_of_day"=15,
+ "month"="05","year"=2013,
+ "county_name"="Orange County"),
+ type="response",se.fit=T)
+nc.of.pred = predict(nc.search,
+ newdata = data.frame("of_gender"=c(0,1),
+ "race_gender"=0,
+ "subject_age"=36,
+ "investigatory"=1,
+ "Officer_Years_of_Service"=10.25,
+ "of_race"=0,"month"="01",
+ "year"=2019,"CMPD_Division"="South Division"),
+ type="response",se.fit=T)
+
+
+
+pred.df = data.frame("Department" = c("Charlotte Police Department",
+ "Charlotte Police Department",
+ "Florida Highway Patrol",
+ "Florida Highway Patrol"),
+ "Gender" = c("Male","Female","Male","Female"),
+ "Predict" = c(nc.of.pred$fit,
+ fl.of.pred$fit),
+ "Lower"=c(nc.of.pred$fit-1.96*nc.of.pred$se.fit,
+ fl.of.pred$fit-1.96*fl.of.pred$se.fit),
+ "Upper"=c(nc.of.pred$fit+1.96*nc.of.pred$se.fit,
+ fl.of.pred$fit+1.96*fl.of.pred$se.fit))
+
+png("Figures/Fig2_PredProb.png",
+ 900,514)
+ggplot(data = pred.df, aes(x=Gender,y=Predict)) +
+ geom_point(size=4) +
+ geom_errorbar(aes(ymin = Lower, ymax = Upper),
+ width=.2,size = 0.75,
+ position=position_dodge(.9)) +
+ ylab("Expected Probbility of a Search") +
+ xlab("Officer Sex") +
+ theme_bw(base_size=15) +facet_wrap(~Department)
+dev.off()
+
## quartz_off_screen
+## 2
+
pred.df$Predict[1]/pred.df$Predict[2]
+
## [1] 2.245964
+
pred.df$Predict[3]/pred.df$Predict[4]
+
## [1] 2.720538
+
# Table 3
+tab3 = data.frame("Officer Gender"=c("Male","Female"),
+ "Searches"=table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$search_occur[!is.na(fl$search_occur)])[,2],
+ "Contraband"=table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$contra[!is.na(fl$search_occur)])[,2],
+ "Contraband Hit Rate"=table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$contra[!is.na(fl$search_occur)])[,2]/
+ table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$search_occur[!is.na(fl$search_occur)])[,2],
+ "Difference"=c((table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$contra[!is.na(fl$search_occur)])[,2]/
+ table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$search_occur[!is.na(fl$search_occur)])[,2])[1]-
+ (table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$contra[!is.na(fl$search_occur)])[,2]/
+ table(fl$of_gender[!is.na(fl$search_occur)],
+ fl$search_occur[!is.na(fl$search_occur)])[,2])[2],NA))
+tab3
+
## Officer.Gender Searches Contraband Contraband.Hit.Rate Difference
+## 0 Male 16422 4911 0.2990501 -0.1163911
+## 1 Female 272 113 0.4154412 NA
+
prop.test(table(fl$of_gender[fl$search_occur==1],
+ fl$contra[fl$search_occur==1]))
+
##
+## 2-sample test for equality of proportions with continuity correction
+##
+## data: table(fl$of_gender[fl$search_occur == 1], fl$contra[fl$search_occur == 1])
+## X-squared = 16.681, df = 1, p-value = 4.423e-05
+## alternative hypothesis: two.sided
+## 95 percent confidence interval:
+## 0.05554105 0.17724120
+## sample estimates:
+## prop 1 prop 2
+## 0.7009499 0.5845588
+
# Table 4
+load("Data/FlContra_OLS.RData")
+load("Data/FlSearchRate_OLS.RData")
+load("Data/FlStopRate_OLS.RData")
+screenreg(list(fl.contra,contra.search.rate.reg,contra.stop.rate.reg),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "investigatory" = "Investigatory Stop Purpose"),
+ custom.model.names = c("(1) Contra|Search",
+ "(2) Hit Rate, per 10 Searches",
+ "(3) Hit Rate, per 100 Stops"),
+ digits=4)
+
##
+## =========================================================================================================
+## (1) Contra|Search (2) Hit Rate, per 10 Searches (3) Hit Rate, per 100 Stops
+## ---------------------------------------------------------------------------------------------------------
+## (Intercept) 0.1118 ** 0.3006 0.1380 **
+## (0.0421) (0.2148) (0.0176)
+## Female Officer 0.1026 ** 1.1223 ** -0.0771 **
+## (0.0294) (0.2760) (0.0117)
+## Black Officer 0.0578 ** 0.7640 ** -0.0976 **
+## (0.0199) (0.2030) (0.0096)
+## White Female -0.0025 0.0512 -0.0557 **
+## (0.0144) (0.1467) (0.0096)
+## Black Male -0.0531 ** -0.4505 ** 0.0975 **
+## (0.0097) (0.1058) (0.0104)
+## Black Female -0.0594 ** -0.4565 ** -0.0519 **
+## (0.0172) (0.1728) (0.0117)
+## Latino Male -0.0909 ** -0.8755 ** -0.0021
+## (0.0115) (0.1195) (0.0107)
+## Latina Female -0.0027 0.0346 -0.0669 **
+## (0.0267) (0.2586) (0.0128)
+## Investigatory Stop Purpose 0.3394 ** 3.4794 ** 0.2534 **
+## (0.0112) (0.1102) (0.0066)
+## ---------------------------------------------------------------------------------------------------------
+## R^2 0.1346 0.1311 0.0036
+## Adj. R^2 0.1265 0.1285 0.0036
+## Num. obs. 12782 9677 747784
+## =========================================================================================================
+## ** p < 0.01; * p < 0.05
+
###
+### 3. Appendix A: Full Regression Results
+###
+
+screenreg(list(nc.search,fl.search,
+ fl.contra,contra.search.rate.reg,contra.stop.rate.reg),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "officer_age"="Officer Age",
+ "factor(of_age)2"="Officer Age: 30-64",
+ "factor(of_age)3"="Officer Age: 65+",
+ "officer_years_of_service"="Officer Years of Service",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "factor(of_exper)1"="Experienced Officer",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "subject_age"="Driver Age",
+ "factor(driver_age)2"="Driver Age: 30-64",
+ "factor(driver_age)3"="Driver Age: 65+",
+ "investigatory" = "Investigatory Stop Purpose",
+ "out_of_state"="Out of State"),
+ custom.model.names = c("(1)","(2)",
+ "(3)","(4)","(5)"),
+ digits=3)
+
##
+## ===================================================================================================
+## (1) (2) (3) (4) (5)
+## ---------------------------------------------------------------------------------------------------
+## (Intercept) 0.086 ** 0.026 ** 0.112 ** 0.301 0.138 **
+## (0.004) (0.001) (0.042) (0.215) (0.018)
+## Female Officer -0.026 ** -0.004 ** 0.103 ** 1.122 ** -0.077 **
+## (0.002) (0.000) (0.029) (0.276) (0.012)
+## Black Officer -0.029 ** -0.003 ** 0.058 ** 0.764 ** -0.098 **
+## (0.001) (0.000) (0.020) (0.203) (0.010)
+## Officer Age -0.000 ** -0.004 **
+## (0.000) (0.001)
+## Officer Age: 30-64 -0.375 ** -0.044 **
+## (0.096) (0.008)
+## Officer Age: 65+ -0.829 -0.262
+## (4.048) (0.183)
+## Officer Years of Service -0.002 ** 0.000 ** -0.000
+## (0.000) (0.000) (0.001)
+## Experienced Officer -0.026 0.053 **
+## (0.086) (0.007)
+## White Female -0.009 ** -0.003 ** -0.003 0.051 -0.056 **
+## (0.002) (0.000) (0.014) (0.147) (0.010)
+## Black Male 0.046 ** 0.007 ** -0.053 ** -0.451 ** 0.098 **
+## (0.002) (0.000) (0.010) (0.106) (0.010)
+## Black Female -0.020 ** -0.001 ** -0.059 ** -0.456 ** -0.052 **
+## (0.002) (0.000) (0.017) (0.173) (0.012)
+## Latino Male 0.001 ** -0.091 ** -0.876 ** -0.002
+## (0.000) (0.011) (0.120) (0.011)
+## Latina Female -0.002 ** -0.003 0.035 -0.067 **
+## (0.000) (0.027) (0.259) (0.013)
+## Driver Age -0.001 ** -0.000 ** -0.003 **
+## (0.000) (0.000) (0.000)
+## Driver Age: 30-64 -0.485 ** -0.123 **
+## (0.085) (0.007)
+## Driver Age: 65+ -1.113 * -0.187 **
+## (0.446) (0.012)
+## Investigatory Stop Purpose 0.028 ** 0.006 ** 0.339 ** 3.479 ** 0.253 **
+## (0.001) (0.000) (0.011) (0.110) (0.007)
+## Out of State 0.001 ** -0.053 ** -0.667 ** 0.037 **
+## (0.000) (0.011) (0.110) (0.008)
+## ---------------------------------------------------------------------------------------------------
+## R^2 0.071 0.009 0.135 0.131 0.004
+## Adj. R^2 0.071 0.009 0.127 0.128 0.004
+## Num. obs. 150547 2712478 12782 9677 747784
+## ===================================================================================================
+## ** p < 0.01; * p < 0.05
+
###
+### 4. Appendix B: Alternative Test of Differences in Search and Contraband Hit Rates
+###
+
+# Florida
+fl$stop = 1
+fl$of_exper = ifelse(fl$officer_years_of_service>=
+ mean(fl$officer_years_of_service,na.rm=T),1,0)
+fl$of_age = ifelse(fl$officer_age<30,1,
+ ifelse(fl$officer_age>64,3,2))
+fl$driver_age = ifelse(fl$subject_age<30,1,
+ ifelse(fl$subject_age>64,3,2))
+fl$hour_of_day=as.numeric(fl$hour_of_day)
+fl$tod = ifelse(fl$hour_of_day<3,1,
+ ifelse(fl$hour_of_day<6,2,
+ ifelse(fl$hour_of_day<9,3,
+ ifelse(fl$hour_of_day<12,4,
+ ifelse(fl$hour_of_day<15,5,
+ ifelse(fl$hour_of_day<18,6,
+ ifelse(fl$hour_of_day<21,7,8)))))))
+
+fl.ag = aggregate(fl[!is.na(fl$search_occur),c("stop","search_occur","contra")],
+ by = list(fl$tod[!is.na(fl$search_occur)],
+ fl$officer_race[!is.na(fl$search_occur)],
+ fl$officer_sex[!is.na(fl$search_occur)],
+ fl$of_exper[!is.na(fl$search_occur)],
+ fl$race_gender[!is.na(fl$search_occur)],
+ fl$driver_age[!is.na(fl$search_occur)],
+ fl$out_of_state[!is.na(fl$search_occur)],
+ fl$investigatory[!is.na(fl$search_occur)]),
+ sum,na.rm=T)
+colnames(fl.ag) = c("tod",
+ "of_race","of_sex","of_exper","driver_rg",
+ "driver_age","out_of_state","invest",
+ "stop","search","contraband")
+fl.ag.female = fl.ag[fl.ag$of_sex=="female",]
+colnames(fl.ag.female)[c(3,9:11)] = c("female","stop.f",
+ "search.f","contra.f")
+fl.ag.male = fl.ag[fl.ag$of_sex=="male",]
+colnames(fl.ag.male)[c(3,9:11)] = c("male","stop.m",
+ "search.m","contra.m")
+
+fl.matches = merge(fl.ag.female,fl.ag.male)
+min.stops = 9
+table(fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops)
+
##
+## FALSE TRUE
+## 1461 1784
+
min.searches = 0
+table(fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches)
+
##
+## FALSE TRUE
+## 3084 161
+
table(fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops)
+
##
+## FALSE TRUE
+## 3084 161
+
# North Carolina
+nc$stop = 1
+nc$search = ifelse(nc$Was_a_Search_Conducted=="Yes",1,0)
+nc$driver_age = ifelse(nc$Driver_Age<30,1,
+ ifelse(nc$Driver_Age>65,3,2))
+nc$of_exper = ifelse(nc$Officer_Years_of_Service>=mean(nc$Officer_Years_of_Service),
+ 1,0)
+nc.ag = aggregate(nc[,c("search","stop")],
+ by = list(nc$CMPD_Division,
+ nc$Officer_Gender,nc$Officer_Race,
+ nc$of_exper,
+ nc$race_gender,nc$driver_age,
+ nc$investigatory,
+ nc$year),
+ sum)
+nc.ag.female = nc.ag[nc.ag$Group.2=="Female",]
+colnames(nc.ag.female) = c("division","female","race","of_exper",
+ "driver.rg","driver_age","investigatory",
+ "year",
+ "searches.f","stops.f")
+nc.ag.male = nc.ag[nc.ag$Group.2=="Male",]
+colnames(nc.ag.male) = c("division","male","race","of_exper",
+ "driver.rg","driver_age","investigatory",
+ "year",
+ "searches.m","stops.m")
+
+
+# Searches
+fl.matches$sr.f = fl.matches$search.f/fl.matches$stop.f
+fl.matches$sr.m = fl.matches$search.m/fl.matches$stop.m
+fl.matches$cr.f = fl.matches$contra.f/fl.matches$search.f
+fl.matches$cr.m = fl.matches$contra.m/fl.matches$search.m
+t.test(fl.matches$sr.f[fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops],
+ fl.matches$sr.m[fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops],
+ paired = T)
+
##
+## Paired t-test
+##
+## data: fl.matches$sr.f[fl.matches$stop.f > min.stops & fl.matches$stop.m > min.stops] and fl.matches$sr.m[fl.matches$stop.f > min.stops & fl.matches$stop.m > min.stops]
+## t = -13.359, df = 1783, p-value < 2.2e-16
+## alternative hypothesis: true difference in means is not equal to 0
+## 95 percent confidence interval:
+## -0.003700686 -0.002753143
+## sample estimates:
+## mean of the differences
+## -0.003226915
+
length(fl.matches$sr.f[fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 1784
+
mean(fl.matches$sr.f[fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 0.001355022
+
mean(fl.matches$sr.m[fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 0.004581936
+
nc.matches = merge(nc.ag.female,nc.ag.male)
+min.stops = 9
+nc.matches$sr.f = nc.matches$searches.f/nc.matches$stops.f
+nc.matches$sr.m = nc.matches$searches.m/nc.matches$stops.m
+t.test(nc.matches$sr.f[nc.matches$stops.f>min.stops&
+ nc.matches$stops.m>min.stops],
+ nc.matches$sr.m[nc.matches$stops.f>min.stops&
+ nc.matches$stops.m>min.stops],
+ paired = T)
+
##
+## Paired t-test
+##
+## data: nc.matches$sr.f[nc.matches$stops.f > min.stops & nc.matches$stops.m > min.stops] and nc.matches$sr.m[nc.matches$stops.f > min.stops & nc.matches$stops.m > min.stops]
+## t = -4.0127, df = 352, p-value = 7.335e-05
+## alternative hypothesis: true difference in means is not equal to 0
+## 95 percent confidence interval:
+## -0.024123468 -0.008254384
+## sample estimates:
+## mean of the differences
+## -0.01618893
+
length(nc.matches$sr.f[nc.matches$stops.f>min.stops&
+ nc.matches$stops.m>min.stops])
+
## [1] 353
+
mean(nc.matches$sr.f[nc.matches$stops.f>min.stops&
+ nc.matches$stops.m>min.stops])
+
## [1] 0.05538775
+
mean(nc.matches$sr.m[nc.matches$stops.f>min.stops&
+ nc.matches$stops.m>min.stops],)
+
## [1] 0.07157667
+
# Contraband
+t.test(fl.matches$cr.f[fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops],
+ fl.matches$cr.m[fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops],
+ paired = T)
+
##
+## Paired t-test
+##
+## data: fl.matches$cr.f[fl.matches$search.f > min.searches & fl.matches$search.m > min.searches & fl.matches$stop.f > min.stops & fl.matches$stop.m > min.stops] and fl.matches$cr.m[fl.matches$search.f > min.searches & fl.matches$search.m > min.searches & fl.matches$stop.f > min.stops & fl.matches$stop.m > min.stops]
+## t = 2.6679, df = 160, p-value = 0.008419
+## alternative hypothesis: true difference in means is not equal to 0
+## 95 percent confidence interval:
+## 0.02401357 0.16088431
+## sample estimates:
+## mean of the differences
+## 0.09244894
+
length(fl.matches$cr.f[fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 161
+
mean(fl.matches$cr.f[fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 0.4090506
+
mean(fl.matches$cr.m[fl.matches$search.f>min.searches&
+ fl.matches$search.m>min.searches&
+ fl.matches$stop.f>min.stops&
+ fl.matches$stop.m>min.stops])
+
## [1] 0.3166016
+
###
+### 5. Appendix C: Logistic Regrssion Models
+###
+
+rm(list = ls())
+
+load("Data/FlContra_Logit.RData")
+load("Data/FLSearch_Logit.RData")
+load("Data/NCSearch_Logit.RData")
+
+texreg(list(nc.search,fl.search,fl.contra),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "factor(of_race)2"="Latinx Officer",
+ "factor(of_race)3"="Asain/Pacific Islander Officer",
+ "factor(of_race)4"="Other Race Officer",
+ "officer_age"="Officer Age",
+ "officer_years_of_service"="Officer Years of Service",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "subject_age"="Driver Age",
+ "investigatory" = "Investigatory Stop Purpose",
+ "out_of_state"="Out of State"),
+ custom.model.names = c("(1) NC Search",
+ "(2) FL Search",
+ "(3) FL Contra|Search"),
+ digits=4)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c}
+## \hline
+## & (1) NC Search & (2) FL Search & (3) FL Contra|Search \\
+## \hline
+## (Intercept) & $-1.9244^{**}$ & $-2.8175^{**}$ & $-17.9811$ \\
+## & $(0.0906)$ & $(0.0900)$ & $(148.7052)$ \\
+## Female Officer & $-0.4702^{**}$ & $-1.4253^{**}$ & $0.4986^{**}$ \\
+## & $(0.0477)$ & $(0.0674)$ & $(0.1547)$ \\
+## Black Officer & $-0.7213^{**}$ & $-1.0929^{**}$ & $0.2932^{**}$ \\
+## & $(0.0387)$ & $(0.0441)$ & $(0.1060)$ \\
+## Latinx Officer & & $-0.3512^{**}$ & $-0.1044$ \\
+## & & $(0.0363)$ & $(0.0924)$ \\
+## Asain/Pacific Islander Officer & & $-1.0206^{**}$ & $0.7392$ \\
+## & & $(0.2019)$ & $(0.5612)$ \\
+## Other Race Officer & & $-0.8249^{**}$ & $0.8317^{*}$ \\
+## & & $(0.1632)$ & $(0.3917)$ \\
+## Officer Age & & $-0.0221^{**}$ & $-0.0202^{**}$ \\
+## & & $(0.0012)$ & $(0.0036)$ \\
+## Officer Years of Service & $-0.0770^{**}$ & $0.0129^{**}$ & $-0.0002$ \\
+## & $(0.0023)$ & $(0.0017)$ & $(0.0045)$ \\
+## White Female & $-0.6166^{**}$ & $-0.8276^{**}$ & $-0.0151$ \\
+## & $(0.0751)$ & $(0.0337)$ & $(0.0782)$ \\
+## Black Male & $0.8877^{**}$ & $0.8883^{**}$ & $-0.2900^{**}$ \\
+## & $(0.0436)$ & $(0.0228)$ & $(0.0534)$ \\
+## Black Female & $-0.4638^{**}$ & $-0.2870^{**}$ & $-0.3230^{**}$ \\
+## & $(0.0518)$ & $(0.0404)$ & $(0.0960)$ \\
+## Latino Male & & $0.3641^{**}$ & $-0.5462^{**}$ \\
+## & & $(0.0276)$ & $(0.0663)$ \\
+## Latina Female & & $-0.7432^{**}$ & $0.0039$ \\
+## & & $(0.0624)$ & $(0.1465)$ \\
+## Driver Age & $-0.0422^{**}$ & $-0.0450^{**}$ & $-0.0161^{**}$ \\
+## & $(0.0012)$ & $(0.0008)$ & $(0.0022)$ \\
+## Investigatory Stop Purpose & $0.6995^{**}$ & $1.5916^{**}$ & $17.9495$ \\
+## & $(0.0298)$ & $(0.0262)$ & $(148.7051)$ \\
+## Out of State & & $0.3653^{**}$ & $-0.3378^{**}$ \\
+## & & $(0.0269)$ & $(0.0667)$ \\
+## \hline
+## AIC & $49914.2052$ & $137958.1571$ & $13507.4833$ \\
+## BIC & $50261.4763$ & $139508.5753$ & $14402.1785$ \\
+## Log Likelihood & $-24922.1026$ & $-68858.0786$ & $-6633.7416$ \\
+## Deviance & $49844.2052$ & $137716.1571$ & $13267.4833$ \\
+## Num. obs. & $150547$ & $2712478$ & $12782$ \\
+## \hline
+## \multicolumn{4}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
###
+### 6. Appendix C: Fixed Effects
+###
+
+rm(list = ls())
+
+load("Data/FLSearch_OLS_FE.RData")
+load("Data/FlContra_OLS_FE.RData")
+load("Data/FlSearchRate_OLS_FE.RData")
+load("Data/FlStopRate_OLS_FE.RData")
+
+texreg(list(fl.search,
+ fl.contra,
+ contra.search.rate.reg,
+ contra.stop.rate.reg),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "officer_age"="Officer Age",
+ "factor(of_age)2"="Officer Age: 30-64",
+ "factor(of_age)3"="Officer Age: 65+",
+ "officer_years_of_service"="Officer Years of Service",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "factor(of_exper)1"="Experienced Officer",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "subject_age"="Driver Age",
+ "factor(driver_age)2"="Driver Age: 30-64",
+ "factor(driver_age)3"="Driver Age: 65+",
+ "investigatory" = "Investigatory Stop Purpose",
+ "out_of_state"="Out of State"),
+ custom.model.names = c("(1) Search",
+ "(2) Contra|Search",
+ "(3) Hit Rate, per 10 Searches",
+ "(4) Hit Rate, per 100 Stops"),
+ digits=4)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c c}
+## \hline
+## & (1) Search & (2) Contra|Search & (3) Hit Rate, per 10 Searches & (4) Hit Rate, per 100 Stops \\
+## \hline
+## (Intercept) & $0.0142^{**}$ & $0.1363^{*}$ & $0.2596$ & $0.0707^{**}$ \\
+## & $(0.0017)$ & $(0.0567)$ & $(0.2384)$ & $(0.0232)$ \\
+## Female Officer & $-0.0026^{*}$ & $0.0916^{*}$ & $0.9424^{*}$ & $-0.0531$ \\
+## & $(0.0013)$ & $(0.0376)$ & $(0.3793)$ & $(0.0334)$ \\
+## Black Officer & $-0.0035^{**}$ & $0.0541$ & $0.3139$ & $-0.0894^{**}$ \\
+## & $(0.0012)$ & $(0.0399)$ & $(0.4081)$ & $(0.0306)$ \\
+## Officer Age & $-0.0001^{**}$ & $-0.0048^{**}$ & & \\
+## & $(0.0000)$ & $(0.0012)$ & & \\
+## Officer Age: 30-64 & & & $-0.4058^{**}$ & $-0.0231$ \\
+## & & & $(0.1474)$ & $(0.0160)$ \\
+## Officer Age: 65+ & & & $-0.5371$ & $-0.1241$ \\
+## & & & $(4.0924)$ & $(0.2141)$ \\
+## Officer Years of Service & $0.0002^{**}$ & $0.0024$ & & \\
+## & $(0.0000)$ & $(0.0016)$ & & \\
+## Experienced Officer & & & $0.3207^{*}$ & $0.0692^{**}$ \\
+## & & & $(0.1614)$ & $(0.0151)$ \\
+## White Female & $-0.0022^{**}$ & $-0.0037$ & $0.0647$ & $-0.0545^{**}$ \\
+## & $(0.0001)$ & $(0.0142)$ & $(0.1418)$ & $(0.0096)$ \\
+## Black Male & $0.0051^{**}$ & $-0.0535^{**}$ & $-0.5417^{**}$ & $0.0851^{**}$ \\
+## & $(0.0001)$ & $(0.0097)$ & $(0.1042)$ & $(0.0104)$ \\
+## Black Female & $-0.0019^{**}$ & $-0.0609^{**}$ & $-0.4922^{**}$ & $-0.0630^{**}$ \\
+## & $(0.0002)$ & $(0.0170)$ & $(0.1682)$ & $(0.0116)$ \\
+## Latino Male & $0.0013^{**}$ & $-0.0909^{**}$ & $-0.8668^{**}$ & $-0.0088$ \\
+## & $(0.0001)$ & $(0.0114)$ & $(0.1177)$ & $(0.0107)$ \\
+## Latina Female & $-0.0019^{**}$ & $-0.0114$ & $-0.1267$ & $-0.0675^{**}$ \\
+## & $(0.0002)$ & $(0.0264)$ & $(0.2512)$ & $(0.0128)$ \\
+## Driver Age & $-0.0001^{**}$ & $-0.0023^{**}$ & & \\
+## & $(0.0000)$ & $(0.0004)$ & & \\
+## Driver Age: 30-64 & & & $-0.3525^{**}$ & $-0.1190^{**}$ \\
+## & & & $(0.0829)$ & $(0.0069)$ \\
+## Driver Age: 65+ & & & $-0.8633^{*}$ & $-0.1688^{**}$ \\
+## & & & $(0.4308)$ & $(0.0117)$ \\
+## Investigatory Stop Purpose & $0.0041^{**}$ & $0.3340^{**}$ & $3.3725^{**}$ & $0.2428^{**}$ \\
+## & $(0.0001)$ & $(0.0112)$ & $(0.1081)$ & $(0.0067)$ \\
+## Out of State & $0.0018^{**}$ & $-0.0544^{**}$ & $-0.5205^{**}$ & $0.0317^{**}$ \\
+## & $(0.0001)$ & $(0.0112)$ & $(0.1093)$ & $(0.0083)$ \\
+## \hline
+## AIC & $-6993843.0503$ & $15022.3545$ & $54081.7043$ & $3674955.2660$ \\
+## BIC & $-6992267.0054$ & $15931.9613$ & $54311.3845$ & $3675324.0618$ \\
+## Log Likelihood & $3497044.5251$ & $-7389.1773$ & $-27008.8521$ & $-1837445.6330$ \\
+## Num. obs. & $2712478$ & $12782$ & $9677$ & $747784$ \\
+## Num. groups: officer\_id\_hash & $1419$ & $599$ & $$ & $$ \\
+## Var: officer\_id\_hash (Intercept) & $0.0002$ & $0.0150$ & $$ & $$ \\
+## Var: Residual & $0.0044$ & $0.1744$ & $14.8268$ & $7.9441$ \\
+## Num. groups: officer\_id & $$ & $$ & $602$ & $1424$ \\
+## Var: officer\_id (Intercept) & $$ & $$ & $2.1381$ & $0.1270$ \\
+## \hline
+## \multicolumn{5}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
###
+### 7. Appendix D: Interaction Models
+###
+
+rm(list = ls())
+
+# Table 1. Officer Experience
+load("Data/FLSearch_Exper_OLS.RData")
+load("Data/NCSearch_Exper_OLS.RData")
+load("Data/FlContra_Exper_OLS.RData")
+load("Data/FlSearchRate_Exper_OLS.RData")
+load("Data/FlStopRate_Exper_OLS.RData")
+
+texreg(list(nc.search.exper,fl.search.exper,fl.contra.exper,
+ contra.search.rate.exper,contra.stop.rate.exper),
+ stars=c(0.05,0.01),
+ custom.coef.map = list("factor(of_gender)1"="Female Officer",
+ "officer_years_of_service"="Officer Years of Service",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "factor(of_exper)1"="Experienced Officer",
+ "factor(of_gender)1:officer_years_of_service"="Female Officer * Exper.",
+ "factor(of_gender)1:Officer_Years_of_Service"="Female Officer * Exper.",
+ "factor(of_gender)1:factor(of_exper)1"="Female Officer * Exper."),
+ digits = 3)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c c c}
+## \hline
+## & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 \\
+## \hline
+## Female Officer & $-0.025^{**}$ & $-0.004^{**}$ & $0.112^{**}$ & $0.971^{**}$ & $-0.059^{**}$ \\
+## & $(0.003)$ & $(0.000)$ & $(0.040)$ & $(0.364)$ & $(0.015)$ \\
+## Officer Years of Service & $-0.002^{**}$ & $0.000^{**}$ & $-0.000$ & & \\
+## & $(0.000)$ & $(0.000)$ & $(0.001)$ & & \\
+## Experienced Officer & & & & $-0.043$ & $0.056^{**}$ \\
+## & & & & $(0.087)$ & $(0.008)$ \\
+## Female Officer * Exper. & $-0.000$ & $-0.000$ & $-0.002$ & $0.443$ & $-0.047^{*}$ \\
+## & $(0.000)$ & $(0.000)$ & $(0.005)$ & $(0.558)$ & $(0.024)$ \\
+## \hline
+## R$^2$ & $0.071$ & $0.009$ & $0.135$ & $0.129$ & $0.003$ \\
+## Adj. R$^2$ & $0.071$ & $0.009$ & $0.126$ & $0.127$ & $0.003$ \\
+## Num. obs. & $150547$ & $2712478$ & $12782$ & $9677$ & $747784$ \\
+## \hline
+## \multicolumn{6}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
# Table 2. Prop Female
+load("Data/FLSearch_Prop_OLS.RData")
+load("Data/FlContra_Prop_OLS.RData")
+
+texreg(list(fl.search.prop,fl.contra.prop),
+ stars=c(0.05,0.01),
+ custom.coef.map = list("factor(of_gender)1"="Female Officer",
+ "female.prop"="Female Proportion of Proximate Force",
+ "factor(of_gender)1:female.prop"="Female Officer * Female Prop."),
+ digits = 3)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c}
+## \hline
+## & Model 1 & Model 2 \\
+## \hline
+## Female Officer & $-0.003^{**}$ & $0.434^{**}$ \\
+## & $(0.001)$ & $(0.105)$ \\
+## Female Proportion of Proximate Force & $-0.004$ & $-0.269$ \\
+## & $(0.002)$ & $(0.203)$ \\
+## Female Officer * Female Prop. & $-0.010$ & $-3.350^{**}$ \\
+## & $(0.006)$ & $(1.020)$ \\
+## \hline
+## R$^2$ & $0.009$ & $0.136$ \\
+## Adj. R$^2$ & $0.009$ & $0.127$ \\
+## Num. obs. & $2712478$ & $12782$ \\
+## \hline
+## \multicolumn{3}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
# Table 3. Stop Type
+load("Data/FLSearch_StopType_OLS.RData")
+load("Data/NCSearch_StopType_OLS.RData")
+load("Data/FlContra_StopType_OLS.RData")
+load("Data/FlSearchRate_StopType_OLS.RData")
+load("Data/FlStopRate_StopType_OLS.RData")
+
+texreg(list(nc.search.st,fl.search.st,fl.contra.st,
+ contra.search.rate.st,contra.stop.rate.st),
+ stars=c(0.05,0.01),
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "officer_age"="Officer Age",
+ "factor(of_age)2"="Officer Age: 30-64",
+ "factor(of_age)3"="Officer Age: 65+",
+ "officer_years_of_service"="Officer Years of Service",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "factor(of_exper)1"="Experienced Officer",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "factor(race_gender)4"="Latino Male",
+ "factor(race_gender)5"="Latina Female",
+ "subject_age"="Driver Age",
+ "factor(driver_age)2"="Driver Age: 30-64",
+ "factor(driver_age)3"="Driver Age: 65+",
+ "investigatory" = "Investigatory Stop Purpose",
+ "out_of_state"="Out of State"),
+ digits = 3)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c c c}
+## \hline
+## & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 \\
+## \hline
+## (Intercept) & $0.145^{**}$ & $0.045^{**}$ & $0.485^{**}$ & $3.754^{**}$ & $0.449^{**}$ \\
+## & $(0.006)$ & $(0.001)$ & $(0.048)$ & $(0.170)$ & $(0.025)$ \\
+## Female Officer & $-0.032^{**}$ & $-0.006^{**}$ & $0.114^{**}$ & $1.322^{**}$ & $-0.147^{**}$ \\
+## & $(0.003)$ & $(0.000)$ & $(0.034)$ & $(0.323)$ & $(0.022)$ \\
+## Black Officer & $-0.039^{**}$ & $-0.005^{**}$ & $0.065^{**}$ & $0.892^{**}$ & $-0.195^{**}$ \\
+## & $(0.002)$ & $(0.000)$ & $(0.023)$ & $(0.242)$ & $(0.019)$ \\
+## Officer Age & & $-0.000^{**}$ & $-0.004^{**}$ & & \\
+## & & $(0.000)$ & $(0.001)$ & & \\
+## Officer Age: 30-64 & & & & $-0.495^{**}$ & $-0.096^{**}$ \\
+## & & & & $(0.115)$ & $(0.016)$ \\
+## Officer Age: 65+ & & & & & $-0.436$ \\
+## & & & & & $(0.310)$ \\
+## Officer Years of Service & $-0.003^{**}$ & $0.000^{**}$ & $-0.000$ & & \\
+## & $(0.000)$ & $(0.000)$ & $(0.001)$ & & \\
+## Experienced Officer & & & & $-0.037$ & $0.103^{**}$ \\
+## & & & & $(0.104)$ & $(0.014)$ \\
+## White Female & $-0.018^{**}$ & $-0.004^{**}$ & $-0.004$ & $0.068$ & $-0.115^{**}$ \\
+## & $(0.004)$ & $(0.000)$ & $(0.017)$ & $(0.174)$ & $(0.019)$ \\
+## Black Male & $0.055^{**}$ & $0.010^{**}$ & $-0.061^{**}$ & $-0.558^{**}$ & $0.184^{**}$ \\
+## & $(0.003)$ & $(0.000)$ & $(0.011)$ & $(0.127)$ & $(0.020)$ \\
+## Black Female & $-0.028^{**}$ & $-0.002^{**}$ & $-0.068^{**}$ & $-0.562^{**}$ & $-0.105^{**}$ \\
+## & $(0.003)$ & $(0.000)$ & $(0.020)$ & $(0.208)$ & $(0.023)$ \\
+## Latino Male & & $0.002^{**}$ & $-0.109^{**}$ & $-1.087^{**}$ & $-0.004$ \\
+## & & $(0.000)$ & $(0.013)$ & $(0.143)$ & $(0.021)$ \\
+## Latina Female & & $-0.003^{**}$ & $0.005$ & $0.091$ & $-0.135^{**}$ \\
+## & & $(0.000)$ & $(0.032)$ & $(0.314)$ & $(0.025)$ \\
+## Driver Age & $-0.002^{**}$ & $-0.000^{**}$ & $-0.003^{**}$ & & \\
+## & $(0.000)$ & $(0.000)$ & $(0.000)$ & & \\
+## Driver Age: 30-64 & & & & $-0.630^{**}$ & $-0.244^{**}$ \\
+## & & & & $(0.101)$ & $(0.014)$ \\
+## Driver Age: 65+ & & & & $-1.573^{**}$ & $-0.398^{**}$ \\
+## & & & & $(0.567)$ & $(0.023)$ \\
+## Out of State & & $0.003^{**}$ & $-0.065^{**}$ & $-0.864^{**}$ & $0.066^{**}$ \\
+## & & $(0.000)$ & $(0.013)$ & $(0.133)$ & $(0.016)$ \\
+## \hline
+## R$^2$ & $0.071$ & $0.012$ & $0.084$ & $0.047$ & $0.003$ \\
+## Adj. R$^2$ & $0.070$ & $0.012$ & $0.074$ & $0.045$ & $0.003$ \\
+## Num. obs. & $79523$ & $1474530$ & $11041$ & $8045$ & $382456$ \\
+## \hline
+## \multicolumn{6}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
# Table 4. Driver Characteristics
+load("Data/FLInter_Search.RData")
+load("Data/FLInter_Contra.RData")
+load("Data/FLStopRate_Inter_OLS.RData")
+load("Data/FLSearchRate_Inter_OLS.RData")
+load("Data/NCInter_Search.RData")
+
+texreg(list(nc.search.inter,fl.search.inter,fl.contra.inter,
+ contra.search.rate.inter,contra.stop.rate.inter),
+ stars=c(0.01,0.05),
+ custom.coef.map = list("factor(of_gender)1"="Female Officer",
+ "factor(subject_female)1"="Female Driver",
+ "factor(of_race)1"="Black Officer",
+ "factor(of_race)2"="Latinx Officer",
+ "factor(subject_race2)1"="Black Driver",
+ "factor(subject_race2)2"="Latinx Driver",
+ "factor(of_gender)1:factor(subject_female)1"="Female Officer*Driver",
+ "factor(of_race)1:factor(subject_race2)1"="Black Officer*Driver",
+ "factor(of_race)2:factor(subject_race2)1"="Latinx Officer*Black Driver",
+ "factor(of_race)1:factor(subject_race2)2"="Black Officer*Latinx Driver",
+ "factor(of_race)2:factor(subject_race2)2"="Latinx Officer* Driver"),digits=3)
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c c c}
+## \hline
+## & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 \\
+## \hline
+## Female Officer & $-0.024^{**}$ & $-0.005^{**}$ & $0.111^{**}$ & $1.216^{**}$ & $-0.098^{**}$ \\
+## & $(0.002)$ & $(0.000)$ & $(0.034)$ & $(0.315)$ & $(0.015)$ \\
+## Female Driver & $-0.046^{**}$ & $-0.004^{**}$ & $0.010$ & $0.956^{**}$ & $-0.071^{**}$ \\
+## & $(0.001)$ & $(0.000)$ & $(0.010)$ & $(0.266)$ & $(0.014)$ \\
+## Black Officer & $-0.017^{**}$ & $-0.001^{**}$ & $0.020$ & $0.415$ & $-0.077^{**}$ \\
+## & $(0.002)$ & $(0.000)$ & $(0.031)$ & $(0.330)$ & $(0.014)$ \\
+## Latinx Officer & $-0.020^{**}$ & $-0.000$ & $0.063^{*}$ & $1.338^{**}$ & $-0.032^{*}$ \\
+## & $(0.005)$ & $(0.000)$ & $(0.026)$ & $(0.247)$ & $(0.015)$ \\
+## Black Driver & $0.027^{**}$ & $0.006^{**}$ & $-0.044^{**}$ & $-1.295^{**}$ & $0.035$ \\
+## & $(0.001)$ & $(0.000)$ & $(0.009)$ & $(0.318)$ & $(0.019)$ \\
+## Latinx Driver & $-0.007^{**}$ & $0.002^{**}$ & $-0.075^{**}$ & $-0.800^{**}$ & $0.004$ \\
+## & $(0.002)$ & $(0.000)$ & $(0.012)$ & $(0.129)$ & $(0.012)$ \\
+## Female Officer*Driver & $0.003$ & $0.003^{**}$ & $-0.042$ & $-0.315$ & $0.046$ \\
+## & $(0.004)$ & $(0.000)$ & $(0.068)$ & $(0.641)$ & $(0.024)$ \\
+## Black Officer*Driver & $-0.018^{**}$ & $-0.005^{**}$ & $0.085^{*}$ & $0.790$ & $-0.056^{*}$ \\
+## & $(0.003)$ & $(0.000)$ & $(0.043)$ & $(0.470)$ & $(0.023)$ \\
+## Latinx Officer*Black Driver & $-0.001$ & $-0.003^{**}$ & $-0.167^{**}$ & $-1.922^{**}$ & $-0.113^{**}$ \\
+## & $(0.006)$ & $(0.000)$ & $(0.033)$ & $(0.350)$ & $(0.025)$ \\
+## Black Officer*Latinx Driver & $0.002$ & $-0.002^{**}$ & $0.018$ & $0.219$ & $-0.016$ \\
+## & $(0.005)$ & $(0.000)$ & $(0.047)$ & $(0.513)$ & $(0.024)$ \\
+## Latinx Officer* Driver & $0.012$ & $-0.002^{**}$ & $-0.088^{**}$ & $-1.132^{**}$ & $-0.038$ \\
+## & $(0.008)$ & $(0.000)$ & $(0.034)$ & $(0.348)$ & $(0.023)$ \\
+## \hline
+## R$^2$ & $0.063$ & $0.009$ & $0.132$ & $0.132$ & $0.004$ \\
+## Adj. R$^2$ & $0.063$ & $0.009$ & $0.124$ & $0.130$ & $0.003$ \\
+## Num. obs. & $176332$ & $2658706$ & $12718$ & $9677$ & $747784$ \\
+## \hline
+## \multicolumn{6}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
###
+### 8. Appendix E: A Conservative Test with the Charlotte Police Department
+###
+
+load("Data/NorthCarolina.RData")
+
+table(nc$year)
+
##
+## 2016 2017 2019 2020
+## 41113 46943 96498 33604
+
nc.search16 = lm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+
+ factor(CMPD_Division),
+ data=nc,subset=nc$year==2016)
+nc.search17 = lm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+
+ factor(CMPD_Division),
+ data=nc,subset=nc$year==2017)
+nc.search19 = lm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+
+ factor(CMPD_Division),
+ data=nc,subset=nc$year==2019)
+nc.search20 = lm(search~factor(race_gender)+subject_age+
+ investigatory+
+ factor(of_race)+
+ factor(of_gender)+Officer_Years_of_Service+
+ factor(month)+
+ factor(CMPD_Division),
+ data=nc,subset=nc$year==2020)
+texreg(list(nc.search16,nc.search17,nc.search19,nc.search20),
+ omit.coef = "Division*|month*",
+ custom.coef.map = list("(Intercept)"="(Intercept)",
+ "factor(of_gender)1"="Female Officer",
+ "factor(of_race)1"="Black Officer",
+ "Officer_Years_of_Service"="Officer Years of Service",
+ "investigatory"="Investigatory Stop",
+ "factor(race_gender)1"="White Female",
+ "factor(race_gender)2"="Black Male",
+ "factor(race_gender)3"="Black Female",
+ "subject_age"="Driver Age"),
+ stars=c(0.01,0.05))
+
##
+## \begin{table}
+## \begin{center}
+## \begin{tabular}{l c c c c}
+## \hline
+## & Model 1 & Model 2 & Model 3 & Model 4 \\
+## \hline
+## (Intercept) & $0.10^{**}$ & $0.09^{**}$ & $0.09^{**}$ & $0.10^{**}$ \\
+## & $(0.01)$ & $(0.01)$ & $(0.01)$ & $(0.01)$ \\
+## Female Officer & $-0.03^{**}$ & $-0.03^{**}$ & $-0.02^{**}$ & $-0.02^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.01)$ \\
+## Black Officer & $-0.03^{**}$ & $-0.03^{**}$ & $-0.03^{**}$ & $-0.04^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.00)$ \\
+## Officer Years of Service & $-0.00^{**}$ & $-0.00^{**}$ & $-0.00^{**}$ & $-0.00^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.00)$ \\
+## Investigatory Stop & $0.02^{**}$ & $0.02^{**}$ & $0.03^{**}$ & $0.04^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.00)$ \\
+## White Female & $-0.01^{**}$ & $-0.00$ & $-0.01^{**}$ & $-0.01$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.01)$ \\
+## Black Male & $0.04^{**}$ & $0.05^{**}$ & $0.04^{**}$ & $0.04^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.00)$ \\
+## Black Female & $-0.02^{**}$ & $-0.01^{**}$ & $-0.02^{**}$ & $-0.03^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.01)$ \\
+## Driver Age & $-0.00^{**}$ & $-0.00^{**}$ & $-0.00^{**}$ & $-0.00^{**}$ \\
+## & $(0.00)$ & $(0.00)$ & $(0.00)$ & $(0.00)$ \\
+## \hline
+## R$^2$ & $0.07$ & $0.06$ & $0.08$ & $0.09$ \\
+## Adj. R$^2$ & $0.07$ & $0.06$ & $0.08$ & $0.09$ \\
+## Num. obs. & $31275$ & $34701$ & $64501$ & $20070$ \\
+## \hline
+## \multicolumn{5}{l}{\scriptsize{$^{**}p<0.01$; $^{*}p<0.05$}}
+## \end{tabular}
+## \caption{Statistical models}
+## \label{table:coefficients}
+## \end{center}
+## \end{table}
+
+
+
+
+