Dear Statalisters
Is there an in-built command/option with -biprobit- which shows the result for Wald's exogeneity test (or something similar). Is it straightforward enough to do "by hand" if no built-in command is available? My code is

Code:
biprobit (math $xlist tuition) (tuition= $zlist), nolog
Additionally, if there is not much difference between -ivprobit- and -biprobit- results, is it appropriate to use -ivprobit- even if the endogenous regressor is a dummy?