Re: st: Pseudo R2 in poisson regression

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 03:05 PM 8/4/2005 -0400, Raymond wrote:
> the command I'm using is:
> xi:poisson death i.age i.cohort i.period, exposure(population) constraints (1)
I believe the constraint is what is zapping you.  You should notice that 
you are also getting a Wald chi-square instead of an LR 
chi-square.  (Perhaps exposure zaps you too, but constraint definitely does.)

You could probably calculate by hand.  Alternatively, what is the 
constraint?  You might be able to specify the constraint some other way, 
e.g. add 2 vars together so their estimated effects are equal.


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Richard Williams, Notre Dame Dept of Sociology
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