Dear Statalisters,
I have the following problem but couldnt solved it quite sometime.
I have estimated with tobit instrumental regression this equation (on cross section data) i.e
ivtobit Y1 X1 X2 X3 (Z=X4 X5) twostep, ll(0)
Next, I would like to test the overidentifying restrictions after the ivtobit command
Thus I am using the overid module developped by Christopher Baum with the next command
overid
I have this following message : invalid syntax
DO YOU HAVE A SOLUTION?
HOW CAN I PROGRAM THIS IN STATA?
Thanks a lot
ol
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