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st: MFX after ZINB


From   Chris Roebuck <Chris.Roebuck@Advancepcs.com>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: MFX after ZINB
Date   Thu, 13 Feb 2003 15:48:53 -0600

Can someone please explain how one could get POSITIVE marginal effects
(using MFX) after running a ZINB model where the corresponding coefficient
estimate is NEGATIVE.

Thanks, 
Chris Roebuck

*****************************
M. Christopher Roebuck, MBA
Health Economist
AdvancePCS
chris.roebuck@advancepcs.com
410-229-8382 office
410-785-8140 fax
*****************************
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