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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

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

Subject |
st: RE: How do I impose the constraint that rho is a given number (eg 0.2) using biprobit? |

Date |
Sat, 20 Mar 2010 21:40:00 +0100 |

<> Transfer the FAQ to your case: ************* webuse school, clear constraint define 1 [athrho]_cons=`=.5*log((1+.2)/(1-.2))' biprobit private vote logptax loginc years, constr(1) ************* HTH Martin -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Claudia Berg Sent: Samstag, 20. März 2010 19:57 To: statalist@hsphsun2.harvard.edu Subject: st: How do I impose the constraint that rho is a given number (eg 0.2) using biprobit? 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/ * * 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/

**References**:**st: How do I impose the constraint that rho is a given number (eg 0.2) using biprobit?***From:*Claudia Berg <cberg@gwmail.gwu.edu>

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