st: xtlogit, excluding individuals with few obs

[Dirk Nachbar <Dirk.Nachbar@dwp.gsi.gov.uk>]

Dear all

I want to run xtlogit with many explanatory variables, but some individuals have only few observations. Now I need to find a neat way to exclude those which have few obs. In pseudocode this would be

for id=1 to 10000

drop rows(id) if numobs(id)<4

end

But how do I do this is STATA?

Dirk Nachbar

Assistant Economist

Pensim2

Department for Work and Pensions

Level 4, The Adelphi

1-11 John Adam St

WC2N 6HT London