Dear R-users I am trying to analyse the interaction between men and women participation in the labour market. So I have too equations of participation like this h1=h1(w1,X1,h2) and h2=h2(w2,X2,h1) where 1=men, 2=women, h=hours worked, w=wages and X=taste variables. A basic approach would be to use Heckit{micEcon} procedure (which correct selection bias) to estimate each equation independently. But this approach is biased. So I want to use a simultaneous equations like what is done by systemfit{systemfit}. Does anyone show willing by suggest me how to proceed? Patrick Kevin MZOGANG ___________________________________________________________________________ Yahoo! Questions/R?ponses pour partager vos connaissances, vos opinions et vos exp?riences. http://fr.answers.yahoo.com