help grcompare
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 Alternative Measures of Statistical Group Comparisons in Binary Regression Mod
> els

  gradip       average difference in predicted probabilities over a range
  grdiame      difference in group averaged marginal effects
  grdidip      difference in difference in predicted probabilities
  grdigap      difference in group averaged predicted probabilities
  grmarg       (local) marginal effects and difference in marginal effect

For these programs to run well, you need to install SPost first as the grcompar
> e commands use some low 
utility programs from SPost (search SPost) written for Stata 9 (spost9_ado).  W
> hile installing SPost, 
you need to be aware that there could be variations across different versions. 
> More recent versions of SPost may 
work well with grcompare, but the author of grcompare has not systematically te
> sted yet.  You are encouraged to 
cite our work if you use this suite of commands in your own works:

  Xu, Jun and Andrew S. Fullerton. "Making Group Comparisons in Binary
    Regression Models Using grcompare."

  Xu, Jun and Andrew S. Fullerton. "Comparing, Clarifying or Confounding:
    Alternative Measures of Statistical Group Comparisons in Binary
    Regression Models"

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  Authors: Jun Xu