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Re: st: Chi-square test for Categorical Data Analysis


From   "Austin Nichols" <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Chi-square test for Categorical Data Analysis
Date   Tue, 18 Sep 2007 17:12:56 -0400

Maarten--
While -intreg- does seem tailor-made in some ways for this problem of
testing whether e.g. E(Y|X=A)>E(Y|X=B) when Y is discretized as Y*
(measured in large intervals), by simply typing e.g.
    intreg ystar groupA
the assumption in -intreg- is that e (or Y-bX) is N(0,s) which seems
unlikely to hold true for incomes measured in dollars.

On 9/18/07, Maarten buis <maartenbuis@yahoo.co.uk> wrote:
> You lose information that way, and if you just want to test, why not do
> that on the whole distribution? More interesting would be to use
> -intreg- as this command was specifically designed for this case.
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