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Re: st: Questions about xtfrontier and predict


From   Scott Merryman <scott.merryman@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Questions about xtfrontier and predict
Date   Fri, 12 Aug 2011 13:19:20 -0500

http://www.stata.com/statalist/archive/2005-06/msg00578.html

Scott


On Thu, Aug 11, 2011 at 2:59 PM, Huerta, Tim <tim.huerta@ttu.edu> wrote:
>
> Hello everyone,
>
> First, thanks in advance for any help you can offer.
>
> Second, I was using xtfrontier to run a cost efficiency model using panel data. I thought everything was going well… However, I ran "predict" to get the technical efficiency and the values aren't what I expected them to be. What am I missing here? Shouldn't CSCE_XTCE_te be less than 1 for the Technical Efficiency?
>
> predict CSCE_XTCE_te, te
> predict CSCE_XTCE_u, u
> predict CSCE_XTCE_xb, xb
>
> . sum CSCE_XTCE_te CSCE_XTCE_u CSCE_XTCE_xb if CEMatch_SET == 1
>
>    Variable |       Obs        Mean    Std. Dev.       Min        Max
> -------------+--------------------------------------------------------
> CSCE_XTCE_te |      7818    4.871268    1.447222   1.245426   14.91451
>  CSCE_XTCE_u |      8177    1.548295    .2953062   .2184742   2.694779
> CSCE_XTCE_xb |      7818    5.535017    1.038628   2.859497   8.786513
>

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