d biprobit2.  Allow the maximim iterations to be specified on comparison models
d Program by Vince Wiggins, StataCorp <vwiggins@@stata.com>.
d Temporary distribution, 04 September 2001.
d
d Accepts the citer(#) option which specifies the maximum number of iterations 
d on the comparison probit models.  May allow estimation in situations where 
d there are perfect predictors in one or both of the probit estimations and the
d probit comparison models are having difficulty converging.

f biprobit2.ado