st: Hausman test with frontier

["Philip Stevens" <pstevens@niesr.ac.uk>]

Given that one of the assumptions of the Battese & Coelli type 
frontier estimators is the independence of the efficiency scores, is 
it possible to perform a Hausman test of a frontier model vs the 
equivalent fixed-effects model in the way one would test a random 
effects model?

Philip
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