Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: What multiple regression model for extreme distributions


From   Ronan Conroy <rconroy@rcsi.ie>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: What multiple regression model for extreme distributions
Date   Tue, 2 Feb 2010 18:29:53 +0000

On 2 Feabh 2010, at 15:09, muhammed abdul khalid wrote:

I have a household income survey data ( 38,000 observations), and my
problem is doing a multiple regression on saving ( independent var) to
ethnicity/strata/employment
etc( dependent var).

The problem is this : 70% of my observation for the value of saving is
zero.

Then this sounds like a two-stage model. The first model predicts whether the family saves or not, the second predicts how much they save, conditional on their saving at all. I would be wary of predicting everything in a single model - the determinants of how much may not be the same as the determinants of whether.


Ronan Conroy
=================================

rconroy@rcsi.ie
Royal College of Surgeons in Ireland
Epidemiology Department,
Beaux Lane House, Dublin 2, Ireland
+353 (0)1 402 2431
+353 (0)87 799 97 95
+353 (0)1 402 2764 (Fax - remember them?)
http://rcsi.academia.edu/RonanConroy

P    Before printing, think about the environment




*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index