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From | Nora Reich <nhmreich@googlemail.com> |
To | statalist@hsphsun2.harvard.edu |
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. Nora Am 21. April 2012 21:33 schrieb Nora Reich <nhmreich@googlemail.com>: > 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 > www.nora-reich.de > Publications: > http://www.nora-reich.de/publikationen.html > http://www.hwwi.org/ueber-uns/team/forscher/nora-reich/publications.html -- Nora Reich www.nora-reich.de Publications: http://www.nora-reich.de/publikationen.html http://www.hwwi.org/ueber-uns/team/forscher/nora-reich/publications.html * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/