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Re: st: control a variable in stata

From   Nora Reich <>
Subject   Re: st: control a variable in stata
Date   Sat, 21 Apr 2012 21:38:53 +0200

Andy, by the way, what is the value of the R2? It gives you a hint on
how much of the variation in salary can be explained by your model. I
would improve the model with new variables (as proposed earlier) and
see which ones have a significant effect and which ones lead to
substantial increases in R2.


Am 21. April 2012 21:33 schrieb Nora Reich <>:
> As far as I know, -poisson- is for skewed distributions, and salary
> distribution in general often fulfills this requirement, but salary of
> NBA players might show a different distribution. The distribution can
> be checked, e.g. with the command
> -histogram salary-
> (for more information type -help histogram-).
> Andy, I would compare the assumptions and requirements of different
> estimation strategies (OLS, poisson) and find out which fits better
> with the data.
> I would also check which estimations strategies are used by similar
> papers, and why.
> Apart from -poisson- and -regress-, I cannot think of any at the
> moment that have to be considered for your salary-estimations.
> However, if there was something like a "minimum wage" for NBA players,
> i.e. salary is censored,  -tobit- would be an alternative.
> Best regards
> Nora
> --
> Nora Reich
> Publications:

Nora Reich

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