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MasterCodeofCashmereProject_plm_robustness_D.Rmd
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---
title: "Robustness Check with D (Houses never in CHS zone) as the base group"
author: "Peng Sun"
date: "10/03/2022"
output:
pdf_document: default
html_document: default
---
```{r load packages, message=FALSE, warning=FALSE}
#Load packages
#install.packages("clubSandwich")
library(readr)
library(did)
library(fixest)
library(DRDID)
library(tidyverse)
library(plm)
library(stargazer)
library(sandwich)
library(lmtest)
library(jtools)
library(clubSandwich)
```
```{r,message=FALSE, warning=FALSE}
#read data
setwd("~/R")
df2012<-read_csv("~/R/df2012_20210920.csv")
```
```{r}
# set levels of timedummy variables so that Y2012 will be used as
names(df2012)
unique(df2012$timedummy)
```
```{r, message=FALSE, warning=FALSE}
df2012$timedummy<-fct_relevel(df2012$timedummy,levels="Y2012","Y2013","Y2014","Y2015","Y2016","Y2017","janapr18","t1","t2")
#set levels of groups dummies so that Group C will be used as base
df2012$groups<-fct_relevel(df2012$groups, levels="C","A","B","D")
# set levels of period dummies so that t0 period will be used as base
df2012$periods<-fct_relevel(df2012$periods, levels="t0","t1","t2")
df2012<-df2012%>%select(-1)
```
```{r}
df2012<-df2012 %>%
mutate(timedummy2=case_when(year==2012~"Y2012",
year==2013~"Y2013",
year==2014~"Y2014",
year==2015~"Y2015",
year==2016~"Y2016",
year==2017~"Y2017",
janapr18==1~"Y2018janapr",
t1==1~"Yt1",
t2==1~"Yt2"))
unique(df2012$timedummy2)
```
# Robustness check by using Group D as the control group
## Create the imputated dataset (used in Col 2 and 4)
```{r}
# use the mean land_area and floor_area for imputation
mean(df2012$land_area, na.rm="true")
```
```{r}
mean(df2012$floor_area)
# only keep three significant figures
```
```{r}
df2012_mutated <- df2012
df2012_mutated$contour=replace_na(df2012_mutated$contour,"Unreported")
df2012_mutated$deck=replace_na(df2012_mutated$deck,"Unreported")
df2012_mutated$roof_material=replace_na(df2012_mutated$roof_material,"Unreported")
df2012_mutated$wall_material=replace_na(df2012_mutated$wall_material,"Unreported")
df2012_mutated$building_age=replace_na(df2012_mutated$building_age,"Unreported")
df2012_mutated$land_area=replace_na(df2012_mutated$land_area,0.069)
df2012_mutated$floor_area=replace_na(df2012_mutated$floor_area,136)
```
```{r}
garage=df2012_mutated$garages_mainroof
```
```{r}
# replace msising values with Unreported
garage[is.na(garage)]<-"Unreported"
```
```{r}
which(is.na(garage))
```
```{r}
df2012_mutated$garages_mainroof<-garage
```
```{r}
bedrooms_min=df2012_mutated$bedrooms_min
# replace msising values with Unreported
bedrooms_min[is.na(bedrooms_min)]<-"Unreported"
#head(bedrooms_min)
df2012_mutated$bedrooms_min<- bedrooms_min
```
## column 1
```{r}
col1_D<-plm(lp~t1+t2+A+B+D+t1*A+t2*A+t1*B+t2*B+t1*C+t2*C,data=df2012, model="pooling", index=c("houseid","year") )
summary(col1_D)
```
```{r}
coefplot(col1_D,keep=c("t1:A","t2:A","t1:B","t2:B","t1:C","t2:C"), ylim=c(-0.4,0.4), axis.text.x = element_text(size=14))
```
## Column 2
```{r}
col2_D<-lm(lp~t1+t2+t1*A+t2*A+t1*B+t2*B+t1*C+t2*C+floor_area+land_area+bedrooms_min+as.factor(building_age)+ as.factor(deck)+ as.factor(wall_material)
+as.factor(roof_material)+as.factor(garages_mainroof)+ as.factor(contour)+as.factor(timedummy2) +as.factor(suburb),data=df2012_mutated)
summary(col2_D)
```
```{r}
coefplot(col2_D,keep=c("t1:A","t2:A","t1:B","t2:B","t1:C","t2:C"), ylim=c(-0.4,0.4), axis.text.x = element_text(size=14))
```
## Column 3
```{r}
col3_D<-plm(lp~yr2012+yr2013+yr2014+yr2015+yr2016+yr2017+t1+t2+A+B+D+t1*A+t2*A+t1*B+t2*B+t1*C+t2*C,data=df2012, model="within",effect="individual", index=c("houseid","year"))
summary(col3_D)
```
```{r}
coefplot(col3_D,keep=c("t1:A","t2:A","t1:B","t2:B","t1:C","t2:C"), ylim=c(-0.4,0.4), axis.text.x = element_text(size=14))
```
## Column 4
```{r}
col4_D<-plm(lp~yr2012+yr2013+yr2014+yr2015+yr2016+yr2017+yr2012*A+yr2013*A+yr2014*A+yr2015*A+yr2016*A+yr2017*A+yr2012*B+yr2013*B+yr2014*B+yr2015*B+yr2016*B+yr2017*B+yr2012*C+yr2013*C+yr2014*C+yr2015*C+yr2016*C+yr2017*C+t1+t2+A+B+C+t1*A+t2*A+t1*B+t2*B+t1*C+t2*C+floor_area+land_area+bedrooms_min+as.factor(building_age)+ as.factor(deck)+ as.factor(wall_material)
+as.factor(roof_material)+as.factor(garages_mainroof)+ as.factor(contour)+as.factor(suburb),data=df2012_mutated,model="pooling", index=c("houseid","year"))
summary(col4_D)
```
```{r}
coefplot(col4_D,ylim=c(-0.4,0.4), keep=c("yr2012:A","yr2013:A","yr2014:A","yr2015:A","yr2016:A","yr2017:A","A:t1", "A:t2"), axis.text.x = element_text(size=14))
```
```{r}
coefplot(col4_D,keep=c("yr2012:B","yr2013:B","yr2014:B","yr2015:B","yr2016:B","yr2017:B", "B:t1","B:t2"), axis.text.x = element_text(size=14))
```
```{r}
coefplot(col4_D, keep=c("yr2012:C","yr2013:C","yr2014:C","yr2015:C","yr2016:C","yr2017:C", "C:t1", "C:t2"), axis.text.x = element_text(size=14))
```
## Column 5
```{r}
col5_D<-plm(lp~yr2012+yr2013+yr2014+yr2015+yr2016+yr2017+yr2012*A+yr2013*A+yr2014*A+yr2015*A+yr2016*A+yr2017*A+yr2012*B+yr2013*B+yr2014*B+yr2015*B+yr2016*B+yr2017*B+yr2012*C+yr2013*C+yr2014*C+yr2015*C+yr2016*C+yr2017*C+t1+t2+A+B+C+t1*A+t2*A+t1*B+t2*B+t1*C+t2*C,data=df2012, model="within",effect="individual", index=c("houseid","year"))
summary(col5_D)
```
#Coef graph of column 5
```{r}
coefplot(col5_D, ylim=c(-0.4,0.4),keep=c("yr2012:A","yr2013:A","yr2014:A","yr2015:A","yr2016:A","yr2017:A","janapr18:A", "A:t1","A:t2"), axis.text.x = element_text(size=14))
```
```{r}
coefplot(col5_D,keep=c("yr2012:B","yr2013:B","yr2014:B","yr2015:B","yr2016:B","yr2017:B", "B:t1", "B:t2"), axis.text.x = element_text(size=14))
```
```{r}
coefplot(col5_D, keep=c("yr2012:C","yr2013:C","yr2014:C","yr2015:C","yr2016:C","yr2017:C", "C:t1", "C:t2"), axis.text.x = element_text(size=14))
```