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st: Re: low values of sigma v in frontier analysis

From   "Rao, James" <>
To   <>
Subject   st: Re: low values of sigma v in frontier analysis
Date   Fri, 26 Feb 2010 13:29:44 +0100

Dear Statalisters,


I am running a frontier (stochastic production frontier) model for technical
efficiency and I seem to be getting an extremely low value for "sigma v"
which implies no stochastic error. Anyone with an idea why this could be so? 




Rao E.O. James (Msc)

Research Associate/PhD Student


Department of Agricultural Economics and Rural Development

Georg-August University of Göttingen

Platz der Gottinger Sieben 5

37073 Göttingen, Germany.


Tell:+49-551-394443 (Office)

E-mail: <> ;  


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