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st: RE: Heckman and Oaxaca


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: RE: Heckman and Oaxaca
Date   Thu, 28 Oct 2004 01:37:46 +0100

This is the third time this question has been posted. 
Sorry, no one so far seems to have anything to say.

Please read the Statalist policy on reposts -- TWO is 
the maximum -- and no more reposts, please!!!

http://www.stata.com/support/faqs/res/statalist.html#noanswer

Nick 
[email protected] 

Natalia Ferreira
 
>     I�m estimating a Heckman wage equation to migrants and 
> not migrants, and
> after all I want to compare them by a Oaxaca decomposition, 
> but I have a
> question: there is any problem if my Heckman equation have 
> some dummies? How
> "decomp" command deal with the dummies variables? Does it 
> take means of 
> zeros
> and ones? The results of my "decomp" give me discrimation % 
> of -301.0 (D/R).
> The % should not be between 0-100? The results are below:
> 
> 
> Summary of decomposition results (as %)
> -------------------------------------------
> Amount attributable:             |    -10.3
> - due to endowments (E):         |      5.2
> - due to coefficients (C):       |    -15.5
> Shift coefficient (U):           |     11.6
> Raw differential (R) {E+C+U}:    |      1.3
> Adjusted differential (D) {C+U}: |     -3.9
> ---------------------------------+---------
> Endowments as % total (E/R):     |    401.0
> Discrimination as % total (D/R): |   -301.0
> -------------------------------------------
> 

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