Date:         Wed, 28 Nov 2007 08:16:41 -0800
Reply-To:     jn mao <jn_mao@YAHOO.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         jn mao <jn_mao@YAHOO.COM>
Subject:      Poisson model and NB model
In-Reply-To:  <20071128094228.61C3.JWD@uga.edu>
Content-Type: text/plain; charset=iso-8859-1

Hello SAS-Ls,

  Could someone give me some advice about how to choose adjusted Poisson model and NB model?
  I'm analyzing an over-dispersed data, the NB model shown one variable is not significant, but when I used scale deviance adjust poisson model, that variable becomes significant. I'm not sure which model I should use? why the adjusted poisson model does not consist wit£è¡¡
  NB model?

  Jane


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