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st: a question on Count data estimation in Stata


From   "Bin Sun" <[email protected]>
To   "Stata" <[email protected]>
Subject   st: a question on Count data estimation in Stata
Date   Tue, 11 Jan 2005 22:44:10 -0500

Dear all,
When using stata command "poisson", which model specification is what stata actually does, y = exp(xb + error) or y = exp(xb) + error ?

When using "xtpoisson, fe", which specification is stata actually does, 
y = exp(xb + individual + error) or y = exp(xb) + individual + error or y = exp(xb + individual) + error ?

When using "xtgee y x,fam(poisson) link(log) corr(ar1)", is the error term in the exponential or outside?

thank you very much


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