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Re: st: xtfrontier and frontier

From   Scott Merryman <>
Subject   Re: st: xtfrontier and frontier
Date   Wed, 30 Nov 2011 07:08:15 -0600

You could use -frontier- with country dummy variables.


On Wed, Nov 30, 2011 at 1:47 AM, giovanni federighi
<> wrote:
> Dear Stata users,
> I would like to analyze a panel dataset for 12 countries during a
> period of 15 years using the stochastic frontier approach (in
> particular, the Battese-Coelli model) to measure technical
> efficiencies. Should I use xtfrontier that does not allow directly the
> distinction between u and v or can I also use frontier, since in this
> second case results seem also better?
> Best regards,
> Giovanni
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