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full1
2012 Jul 09
0
Problem in plm package
...ommands I am inputing
into the original function, it gives ncol(X) is 17 or something like that.
My code is (I am not sure about sharing permissions for dataset... ):
library(sampleSelection)
library(foreign)
library(censReg)
library(plm)
library(micEcon)
library(ggplot2)
data <- read.dta('kpfull1.dta')
summary(data)
attach(data)
# profit share ratio. as profit I take profit in 91 which is the closest
year and as share I take number of shares offered for voucher scheme
data$profit_share <- p91/tnsvp
data$debt_assets <- d91/naba
data$naba3 <- naba^3
data$difprofit <- p91-p90
d...