st: model diagnostics after tobit

[Ronnie Babigumira <rb.glists@gmail.com>]

Dear all
I am estimating a tobit and I wonder if there are any routines for model diagnosis in the spirit of the examples given 
in the thread "Outlier Analysis with Logit Models". Specifically I would be interested to see if any observations are 
problematic (leverage, outliers, influence etc) because some of the coefficients look rather strange.

Ronnie
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