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Re: st: "no observations"

From   Richard Williams <>
Subject   Re: st: "no observations"
Date   Mon, 01 May 2006 23:38:07 -0500

At 10:30 PM 5/1/2006, Scott Cunningham wrote:
Anyone know why I keep getting this error.  I ask because it's
impossible that I have "no observations," since I just ran the
poisson MLE procedure prior to executing -mfx-.  So I'm not sure
what's going on here.

.  xi:xtpoisson rp srfm age2 hgc hhd1 i.census i.year
i.census*i.year, fe i(id)

.  mfx, dydx varlist(srfm age age2 hgc hhd1);
no observations
Age isn't in the original xtpoisson command, so perhaps that is the problem.

Richard Williams, Notre Dame Dept of Sociology
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