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st: Re: xtfrontier


From   "Scott Merryman" <smerryman@kc.rr.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: xtfrontier
Date   Sat, 13 Mar 2004 12:17:24 -0600

constraint define 1 [mu]_cons = 0

xtfrontier lndependent lnindependent, ti const(1)

Scott


----- Original Message ----- 
From: "Andrew Chesher" <andrew.chesher@ucl.ac.uk>
To: "statalist" <statalist@hsphsun2.harvard.edu>
Sent: Saturday, March 13, 2004 9:34 AM
Subject: st: xtfrontier


> 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
> 

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