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st: rho in biprobit

From   "Nirina F" <>
Subject   st: rho in biprobit
Date   Mon, 17 Nov 2008 21:27:03 -0500

Hello again,

In my biprobit I get rho=0.6 and 0.7 and then to 3.
I thought that rho has to be between -1 and 1. Am I right?
What is the econometric meaning of this rho being 3 then?   If this is
nonsense then why does Stata runs and give that result anyway?
Thanks in advance for your help.
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