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st: question on dealing with sample selectivity in panel data
A while ago the following question was submitted to the Stata
Listserver, but I wasn't able to find a response. As I have the same
question, I am resubmitting the question in the hopes that somebody
could provide some insights:
>While Stata has -heckman- to perform selection corrections for
>cross-sectional data, I am wondering whether there are any Stata
>commands or user-written programs that allows me to perform selection
>corrections for panel data models.
>Specifically, are there any commands or programs based on Jeffrey M.
>Wooldridge's paper entitled "Selection corrections for panel data
>models under conditional mean independence assumptions" (J. of
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