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st: Transition matrices and probabilities.


From   Andreas Dall Frøseth <Andreas.Froseth@stud.nhh.no>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Transition matrices and probabilities.
Date   Tue, 23 Apr 2013 13:19:04 +0000

Dear listers.

I am currently experiencing some difficulties regarding the analysis in my research paper. I'm trying to replicate the method used in Davidsson, P., Steffens, P. & Fitzsimmons, J. (2009) "Growing profitable or growing from profits: putting the horse in front of the cart?" Journal of Business Venturing, 24(4).. 388-406. This study analysis the relationship between growth and profits, trying to find what determines the best basis for future profitable growth within their sample of swedish and australian firms. They define four categories, based on growth and profits (above or below industry average), and use state transition probabilities as a starting point of their analysis. Further they use standard z-tests to test the differences between the transition proportions. I'm sorry if this explanation is unclear, but hopefully you'll have access to the paper, for further explanations. 

My question on this matter is; is there a way to do this in Stata? I.e. a command allowing me to calculate the transition probabilities on 1 year transitions, as well as 3 or 5 year transitions. I'm working with a large set of (unbalanced) panel data, containing a large number of companies, identified with a company ID. The time variable is "year", being data from 1999 - 2010, but with gaps. At this point, I have calculated the needed variables, but have yet to place the companies in their respective categories, due to uncertainties on another point (a post I made to the list earlier).
If there is no good way to implement this in STATA, I would appreciated it if anyone have suggestions on software that can perform such analysis. 

All feedback will be appreciated.

Kind regards
Andreas
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