Date:         Sun, 9 May 2010 02:18:29 +0000
Reply-To:     goladin@gmail.com
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Murphy Choy <goladin@GMAIL.COM>
Subject:      Re: Zero-Inflated Gamma = Hurdle Gamma?
Comments: To: Ryan Black <ryan.andrew.black@gmail.com>
Content-Type: text/plain; charset="gb18030"

Hi,

I think it is about the same.

------Original Message------
From: Ryan Black
Sender: SAS(r) Discussion
To: SAS-L@LISTSERV.UGA.EDU
ReplyTo: Ryan Black
Subject: Zero-Inflated Gamma = Hurdle Gamma?
Sent: May 9, 2010 9:29 AM

Hi all-

I noticed that Dale showed how to fit a zero-inflated gamma model in NLMIXED
a while back:

http://listserv.uga.edu/cgi-bin/wa?A2=ind0805A&L=sas-l&P=R20779

It seems to me that the zero-inflated gamma model in the link above could be
thought of as a hurdle gamma model, since the zeros are generated from a
binary process while the non-zero responses follow a gamma process.

Is my thinking off here?

Ryan


Sent from my BlackBerry Wireless Handheld

--
Regards,
Murphy Choy

Certified Advanced Programmer for SAS V9
Certified Basic Programmer for SAS V9