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st: Test of Normality and Heteroskedasticity

From   Danny Dan <>
Subject   st: Test of Normality and Heteroskedasticity
Date   Tue, 31 Jan 2012 23:46:12 -0600

Dear all,

Can any one please tell me what are the STATA commands for testing
normality of errors and heteroskedasticity in a tobit model? Also how
to interpret the results of these tests?

I am trying to use Heckman two step estimator, and therefore, before
the estimation, I would like to test these.

Please help.

Thank you.


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