Austin and Maarten,
Thanks for your help. I would like to point out that income is a
categorical variable ranging from 1 to 7 (in ascending order), and
participants had to simply choose the number associated with the
income range. In other words, I do not have a precise dollar income
value for any participant.
Hugh
On 9/18/07, Austin Nichols <[email protected]> wrote:
> 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 <[email protected]> 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.
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
--
Hugh
*
* For searches and help try:
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