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st: xtfrontier


From   Andrew Chesher <andrew.chesher@ucl.ac.uk>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: xtfrontier
Date   Sat, 13 Mar 2004 15:34:22 -0000

xtfrontier estimates a model in which the "inefficiency" error is
N(mu,sigma2) truncated at zero.

Is there a way to constrain mu=0 so that a "half normal" model is estimated?


__________________________________

Andrew Chesher

Centre for Microdata Methods and Practice
http://cemmap.ifs.org.uk

Department of Economics
University College London

phone:    +44 (0) 207 679 5857
fax:        +44 (0) 207 916 2775
email: andrew.chesher@ucl.ac.uk


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