st: Panel Data and Sample Selection

[Axel Heitmueller <Axel.Heitmueller@dwp.gsi.gov.uk>]

Hi there,

I was wondering if (a) there is a consensus on a model using panel data with sample selection as I have come across several (Vella 1998, Zabel 1992 Verbeek 1990, Wooldridge 1995 to name but a few) while the applied literature is fairly slim and (b) whether there is a user written program for either Stata 7 or 8 that estimates these kinds of models.

Many thanks

Axel

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