Eugene,
I would think that if it is a ratio variable an OLS regression would suffice. OLS is pretty robust when it comes to its assumptions so the S shape may not be a problem. However, your definition of "somewhat" S shaped has to be considered. If it is truly an S-shaped (binomial) distribution you should check to see if you can identify a logical cut point and turn your DV into a categorical 0/1 variable and run a logistic regression. If not a simple 0/1, maybe multinomial or ordinal regression would be the way to go. In any event, if you do decide on a categorical DV check out Scott Long's Regression Models for Categorical Dependent Variables Using Stata.
Carter
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Carter Rees, M.A.
Associate Research Scientist
Wyoming Survey�&�Analysis Center
710 Garfield St.
Suite 320
Laramie, WY 82072
307-399-0496
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________________________________________
From: Kang, Eugene [mailto:[email protected]]
Sent: Thursday, October 07, 2004 1:23 PM
To: [email protected]
Subject: st: A continuous DV between 0 and 1
Hi All,
I am using STATA 8 to analyze a model with a ratio DV ranging from 0 to 1. The distribution of this DV is somewhat S-shaped. I was wondering if someone could point me to the correct statistical analysis to use (I can read the STATA manual and other books from there on). I know that this is a simple question, but any assistance would be greatly appreciated! Thanks!
Eugene
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