R 中的固定效果回归

Question

我正在尝试使用 R 和 package plm中的面板数据运行固定效果回归，并且我不断收到错误消息，说我的向量“未找到固定”，因此我无法运行我的回归。

这是我的脚本

library(readr) 
library(plm)
eco_490_data <- read_csv("C:/Users/Steve's pc/Downloads/New folder (2)/Stephens eco class/eco 490 data.csv")
View(eco_490_data)
names(eco_490_data)
Fixed <- plm(Hom ~ LRM + Comp Employment  + beer + Poverty, + pop + Unemployment + Employment + Personal inc + prison pop data = eco_490_data, index = c("year", "msa"), model="within")
summary(Fixed)
### Here are the error's I'm getting  
 
Fixed <- plm(Hom ~ LRM + Comp Employment  + beer + Poverty, + pop + Unemployment + Employment + Personal inc + prison pop data = eco_490_data, index = c("year", "msa"), model="within")
# Error: unexpected symbol in "Fixed <- plm(Hom ~ LRM + Comp Employment"
summary(Fixed)
# Error in summary(Fixed) : object 'Fixed' not found


library(readr) 
library(plm)
eco_490_data <- read_csv("C:/Users/Steve's pc/Downloads/New folder (2)/Stephens eco class/eco 490 data.csv")
View(eco_490_data)
names(eco_490_data)
Fixed <- plm(Hom ~ LRM + Comp Employment  + beer + Poverty, + pop + Unemployment + Employment + Personal inc + prison pop data = eco_490_data, index = c("year", "msa"), model="within")
summary(Fixed)


Fixed <- plm(Hom ~ LRM + Comp Employment  + beer + Poverty, + pop + Unemployment + Employment + Personal inc + prison pop data = eco_490_data, index = c("year", "msa"), model="within")
# Error: unexpected symbol in "Fixed <- plm(Hom ~ LRM + Comp Employment"
summary(Fixed)
# Error in summary(Fixed) : object 'Fixed' not found

Answer 1

删除公式中的逗号并将其移到data参数之前。

看起来有些列中有空格。 您需要将它们包装在反引号中，以便正确处理它们。

Fixed <- plm(Hom ~ LRM + Comp Employment  + beer + Poverty + pop + Unemployment + Employment + `Personal inc` + `prison pop`,
    data = eco_490_data,
    index = c("year", "msa"),
    model="within")