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RE: st: RE: Problem with generating time dummies in panel data


From   "Daghan Yeldan" <caracicatriz2002@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: RE: Problem with generating time dummies in panel data
Date   Mon, 17 Jul 2006 15:33:03 +0200

Thank you at least I get the year dummies, but again I am facing with a problem;
Namely, the variable minder is defined as hp<h and gets the value 1 if this is the case, gets value 0 if this is not the case for each year. Now when I list the variables I see value 0 is attached to a year even if there is no minder value associated with the year. For example
+-----------------------------------------------------------+
| resp96 y minder minder1 minder2 minder3 |
|-----------------------------------------------------------|
1. | 701 1994 0 1 0 0 |
2. | 701 1996 1 0 1 0 |
3. | 1602 1994 . 1 0 0 |
4. | 1602 1996 . 0 1 0 |
5. | 1602 1998 . 0 0 1 |
|-----------------------------------------------------------|

For resp96 1602, there is no minder variable present, but if you look at the dummies there are values attached to them.
If I use them in a regression, then I get muticollinearity and automatically dropped by stata.
My excuses for the inconvienient results but I am stucked with this problem by days.

Thank you in advance,
d




From: "Scott Merryman" <smerryman@kc.rr.com>
Reply-To: statalist@hsphsun2.harvard.edu
To: <statalist@hsphsun2.harvard.edu>
Subject: RE: st: RE: Problem with generating time dummies in panel data
Date: Mon, 17 Jul 2006 08:19:45 -0500

For year dummies I would try -tab year, gen(minder)-

This will create three dummies callers (named minder1, minder2, minder3
corresponding to years 1994, 1996, and 1998).

Scott


> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> statalist@hsphsun2.harvard.edu] On Behalf Of Daghan Yeldan
> Sent: Monday, July 17, 2006 8:15 AM
> To: statalist@hsphsun2.harvard.edu
> Subject: RE: st: RE: Problem with generating time dummies in panel data
>
> thnx for the advice. But I tried them all before I sent this message. The
> problem I get is when I do this,
>
> tab minder,g(min) it only creates two dummies instead of 3. I have 3 years
> of variables.
> How can I solve this problem?
> cheers,
> d


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