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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