constraint define 1 [mu]_cons = 0
xtfrontier lndependent lnindependent, ti const(1)
Scott
----- Original Message -----
From: "Andrew Chesher" <[email protected]>
To: "statalist" <[email protected]>
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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