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st: Blinder-Oaxaca decomposition - Interpretation of output


From   Bettina Lamla <Lamla@mea.mpisoc.mpg.de>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Blinder-Oaxaca decomposition - Interpretation of output
Date   Tue, 4 Dec 2012 10:44:38 +0000

Dear all,

I perform a decomposition analysis using the Oaxaca command from Ben Jann. I have Stata 12.1.

In every specification I find the group difference to be statistically significant, however neither endowments, coefficients not the interaction between these two seem to explain the difference (not significant). I struggle with the interpretation. Can anyone help?

Thanks!

Here is a part of the output:

Blinder-Oaxaca decomposition                
				        Number of obs   =   1076
                                               	        Model           =         linear
Group 1: east = 0                                 N of obs 1      =        690
Group 2: east = 1                                 N of obs 2      =        386

------------------------------------------------------------------------------
       flit3 |           Coef.       Std. Err.      z          P>|z|     [95% Conf. Interval]
-------------  +----------------------------------------------------------------
overall        |
     group_1 |   .5391304   .0192225    28.05   0.000     .5014551    .5768057
     group_2 |   .4378238   .0258589    16.93   0.000     .3871413    .4885063
  difference |   .1013066   .0322209     3.14    0.002     .0381548    .1644584
 endowments | .019734   .0314114     0.63    0.530    -.0418313    .0812993
coefficients |   .0345781   .0352739     0.98    0.327    -.0345575    .1037137
 interaction |   .0469945   .0349906     1.34   0.179    -.0215857    .1155748




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