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st: Re: a question on Count data estimation in Stata


From   "Bin Sun" <[email protected]>
To   <[email protected]>
Subject   st: Re: a question on Count data estimation in Stata
Date   Wed, 12 Jan 2005 10:10:51 -0500

There is no model specification in the help doc..Does anyone know where I can find answers?
----- Original Message ----- 
From: "Bin Sun" <[email protected]>
To: "Stata" <[email protected]>
Sent: Tuesday, January 11, 2005 10:44 PM
Subject: st: a question on Count data estimation in Stata


> 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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