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From | Claudia Berg <cberg@gwmail.gwu.edu> |
To | statalist@hsphsun2.harvard.edu |
Subject | st: How do I impose the constraint that rho is a given number (eg 0.2) using biprobit? |
Date | Sat, 20 Mar 2010 14:57:07 -0400 |
Hi, I'm a newcomer to statalist and hoped you could help me. I'm trying to run a biprobit model with the constraint that rho (the correlation between the errors of the two equations) is fixed at a given value, say 0.2. I found instructions online how to set rho to zero using heckman (see http://www.stata.com/support/faqs/stat/constraints.html) but am unclear how to modify it to fix rho at another value. Thank you! Claudia * * 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/