R 中的固定效果回歸

Question

我正在嘗試使用 R 和 package plm中的面板數據運行固定效果回歸，並且我不斷收到錯誤消息，說我的向量“未找到固定”，因此我無法運行我的回歸。

這是我的腳本

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

刪除公式中的逗號並將其移到data參數之前。

看起來有些列中有空格。 您需要將它們包裝在反引號中，以便正確處理它們。

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")