I don't understand what's happening in RStudio. After running the plm function for fixed effects estimators, I get a warning that appears for whatever I type in R. The warning is
In if (n >= 10000L) return(TRUE) : the condition has length > 1 and only the first element will be used
For instance, consider
#rm(list=ls())
library(wooldridge)
library(plm)
data=wagepan
fixed_effects_model=plm(lwage~d81+d82+d83+d84+d85+d86+d87+married+union+ I(d81*educ)+I(d82*educ)+I(d83*educ)+I(d84*educ)+I(d85*educ)+I(d86*educ)+I(d87*educ),index="nr",model="within",data=data)
summary(fixed_effects_model)
From the summary function onward, I consistently receive the warning message mentioned above.