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From |
"Natalia Ferreira" <nat6672@hotmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: problems with marginal effects of biprobit |

Date |
Fri, 25 Feb 2005 04:12:22 +0000 |

Dear all I´m estimating a biprobit to my child labor problem: 1. Child just study 2. Child study and work 3. Child just work 4. Child neither study or work So the first probit is regarding to Study: 1 if child study and zero otherwise. The second probit refers to work probability: 1 if child work and zero if doesn´t. My problem occours when I want to get the marginal effects of the two equation and all the 4 output probabilities (p11, p10, p01, p00). When I type the command "mfx" after the estimation I get the marginal effects but just for the default probability (p11). As show the table below. I already tried "mfx, predict p10", and all kinds of possible combination, but it didi not work.... Does some one knows how can I get the same marginal effects and estimate probability for all possible combinations, and not just for p11? Thanks for the help, natalia Marginal effects after biprobit y = Pr(bi_prob1=1,bi_prob2=1) (predict) = .01582596 variable dy/dx Std. Err. z P>z [ 95% C.I. ] X id_f .0112753 .00026 43.61 0.000 .010769 .011782 11.9961 f_cor* .0003155 .00076 0.42 0.677 -.001167 .001798 .290431 novo .0034677 .00031 11.22 0.000 .002862 .004074 .904704 velho .0015147 .00051 3.00 0.003 .000525 .002505 .549959 edu_r -.0012177 .00011 -10.91 0.000 -.001437 -.000999 6.91298 edu_c -.0010851 .00012 -9.37 0.000 -.001312 -.000858 6 .73947 migint_r* .0062618 .00259 2.42 0.016 .00119 .011333 .079524 migint_c* -.0033373 .0017 -1.96 0.050 -.00667 -4.5e-06 .08513 nrpc_sm .0030452 .00017 18.18 0.000 .002717 .003374 5.18521 (*) dy/dx is for discrete change of dummy variable from 0 to 1 _________________________________________________________________ MSN Messenger: instale grátis e converse com seus amigos. http://messenger.msn.com.br * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: problems with marginal effects of biprobit***From:*May Boggess <mboggess@stata.com>

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