Dear allI am trying to carry out step-wise panel regression analysis by making
adaptation in the use of plm package. Say, I am trying to regress the explained
variable (DEP) on 3 explanatory variables (EX1, EX2, EX3) using a panel data set
(dat). Of course, the required set of instructions would be:require(plm)reg
<- plm(DEP ~ EX1 + EX2 + EX3, data = dat, method = "within") ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?... (A)But, what I
wish to do (for the purpose of carrying out the analysis iteratively) is as
follows:dep <- "DEP"exp <- c("EX1", "EX2",
"EX3")and then use somehow these dep and exp to get a ?statement
compatible with (A). I tried the following
frm <- as.formula(paste(dep, "~", exp))
reg <- plm(frm, data = dat, method = "within)But it did not work
properly. I could get the output only in respect of DEP ~ EX1, whereas I need
the same in respect of?DEP ~ EX1 + EX2 + EX3.Kindly help. ?RegardsAmarjit Singh
[[alternative HTML version deleted]]