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From |
Maarten buis <maartenbuis@yahoo.co.uk> |

To |
stata list <statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: Bivariate probit model |

Date |
Sat, 5 Sep 2009 12:14:31 +0000 (GMT) |

--- Kristian Jakobsen wrote > I have bivariate probit model where I model the transition in and out > of poverty between two periods. I am however only interested in the > probability of being poor in period 2(either staying poor or entering > poverty). That means that the two transitions that I am interested in > are the probability of being poor in period 2 conditional of being > poor in period 1 together with the probability of being poor in > period 2 conditional on being non-poor in period 2. More formally, > I have: > > y1: poverty status in period 1 > y2: poverty status in period 2 > hh: vector of household characteristics > > But how would you model that in Stata with the conditionalities. I > have put in: > > biprobit y1 y2 hh > > But as far as I can see this will not estimate the probabilities that > I want. The trivial solution is to use -probit y2 hh-, if all you care about is y2, than model y2. Alternatively, you can recover the probabilities you are after after -biprobit- using -predict- with the -pmarg2- option, see -help biprobit postestimation##predict-. *-------- begin example ------------------- webuse school biprobit private vote logptax loginc years predict prvote , pmarg2 mfx, predict(pmarg2) *---------- end example ------------------- ( For more on how to use examples I sent to statalist see: http://www.maartenbuis.nl/stata/exampleFAQ.html ) Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/

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