There should be no warnings, but within a few thousands of accuracy is ok
the SEs may be slightly off. Try method="Nelder-Mead" it may work better
depending on how you set this up.
From: gov2001-l-bounces at
lists.fas.harvard.edu
[mailto:gov2001-l-bounces at
lists.fas.harvard.edu] On Behalf Of John Sheffield
Sent: Sunday, April 20, 2008 8:48 PM
To: gov2001-l at
lists.fas.harvard.edu
Subject: [gov2001-l] Problem 2c
Are people getting the exact answers that Zelig gives you from the
hand-coded poisson and negative binomial models? I've got it to within a few
thousandths, but I can never quite get the exact answer. Also (and I think
this could be the cause of the problem), I'm getting a number of warning
messages that the parameter of lgamma is out of its range; does anyone else
have this issue?
Thanks,
John