Senanu, did you check the manual? R.
----- Original Message -----
From: "Senanu Asamoah" <[email protected]>
To: <[email protected]>
Sent: Friday, September 22, 2006 10:48 AM
Subject: st: RE: xtfrontier and conditional inefficiency effects
Thanks Scott.
Actually, my question also pertains to whether Stata's xtfrontier
command can compute both technical efficiency, and parameters of
exogenous variables which may influence the efficiency of the firm (firm
specific factors - or out of ignorance firm dummies). This would be
equivalent to the Battesse and Coelli (1995) model specification for use
with panel data.
for example, y = f(x1, x2 x3, u)
where u = f(z1, z2, z3)
Thanks.
Sen.
>>> [email protected] 09/21/06 8:28 AM >>>
You could include firm dummy variables with -frontier, cm()- in order
to
exploit the panel nature of the data.
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Senanu Asamoah
> Sent: Wednesday, September 20, 2006 3:16 PM
> To: [email protected]
> Subject: st: xtfrontier and conditional inefficiency effects
>
> I am trying to estimate technical efficiency, for stochastic
frontier
> analysis, conditional on a set of z variables, for panel data.
>
> For cross-section, I understand the command:
> frontier y x1 x2, distr(tnormal) cm (z1 z2)
> will do the trick.
>
> However, for the command xtfrontier I am able to get the technical
> efficiency estimates, but not sure how to condition those on a set of
z
> variables as is available with the frontier command. Is there a code
to
> compute this in stata?
>
> xtfrontier y x1 x2, tvd [want to condition te on a set of z
variables].
> Please help.
>
> Sen.
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