Hi Austin,
Thanks for your suggestion. I'm going to do what you recommended,
i.e. pweight and read up on the svy manual. I have read the pweight
description several times and I didn't quite understand it until
you've explained it. Thanks a lot for your help!
Cheers,
Ada
On 2/6/06, Austin Nichols <[email protected]> wrote:
> You should be using
> . reg lnwage sex age agesq [pweight=calwght]
> if you have no other survey design info (otherwise see -help svy-).
> See -help weights- for the following: "pweights, or sampling weights,
> are weights that denote the inverse of the probability that the
> observation is included due to the sampling design," which implies
> that in the absence of any complex sample design, they represent the
> number of people in the group that a given obs was drawn from (i.e. if
> the probability is 1/N then the inverse of the probability is N). You
> should certainly never use fweights or aweights with survey data
> unless you care not at all about getting correct standard errors, test
> statistics, etc.
>
> RTSM:
> You might also read the [SVY] manual before you spend too much time estimating.
>
> On 2/6/06, Ada Ma <[email protected]> wrote:
> > I'm estimating a mincer wage equation:
> > The data set I'm using comes with a population weight variable, so I estimate:
> > reg lnwage sex age agesq [fweight=calwght]
>
> *
> * 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/
>
--
Ada Ma
Research Fellow
Health Economics Research Unit
University of Aberdeen, UK.
http://www.abdn.ac.uk/heru/
Tel: +44 (0) 1224 553863
Fax: +44 (0) 1224 550926
*
* For searches and help try:
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* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
