Stata frontier result

In Stata frontier result:

sigma_v and sigma_u ………. standart deviation of errors.

/lnsig2v and /lnsig2u ………..parameterized of sigma-v and sigma_u

sigma2 ……………………………estimate of total error variance

lambda ……………………………estimate of ratio of standartdev of  “u” to the standart dev of  “v”.

Bottom of output is a test of null hipotesis … (not yet)

Stata commands

I want to add some stata commands here. My most used ones:

Exporting from excel to stata:

insheet using “C:\Documents and Settings\yildizm\Desktop\documentname.csv”

taking natural logs:

gen logneonatmon = log(neonatmon)

renaming variables:

Data/ variable manager

Converting missing variable to 0

recode logbeds (mis = 0)

Corelasyon matrix

correlate beds polroom area xray usg eko ct