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st: imputing continuous values when respondents select categories, e.g., income category


From   Alan Acock <acock@mac.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: imputing continuous values when respondents select categories, e.g., income category
Date   Thu, 23 Apr 2009 15:33:53 -0700

This is a question for an econometrician or anybody else who has a good way to estimate a continuous value for income when respondents select a category, such as 0-5000, 5001 - 9999, 10000 - 25,000, etc. Note categories have a different width. We have many variables that could predict a score (education, gender, marital status, number of children, etc. and need the prediction to be a value within the range of the category the respondent selected. There is, of course a problem with the "Over 125,000" category and help on that would me a bonus!
Chandra Bhat wrote an article, Imputing a cntinuous income variable from grouped and missing income observations, 1994, Economics Letters 46: 311-319. Questions:
1. Has anybody implemented this as a user written command in Stata?
2. Are there alternatives to this implemented in Stata? 
Years ago somebody did this in TSP and I know nothing about that program. The program isn't commented, so I can't make any sense out of it.

Thanks,

Alan Acock
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