Dear Stata users
I am estimating efficiency in agriculture. I am using cross section data and some
values of two explanatory varaibles are zero. Due to zero values I am unable to take log
of regressors and when I use xtfrontier with unticking time varaibles for panel setting I
am getting the message insufficient observations. There are 30 observations in my
sample. I wonder is this due to zero values or not taking logs of variables or my sample
size is too low. I will highly appreciate help for my question.
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