Re: st: Not concave in xtfrontier

["Scott Merryman" <scott.merryman@gmail.com>]

Does it converge if you do not suppress constant term?

Scott


On 7/10/07, vinish kathuria <vinish67@yahoo.com> wrote:
> hello!
>
> I am using 'xtfrontier' for a C-D production function
> for 24 sectors with data from 1994 to 2005.
>
> While doing the analysis sector-wise, I am getting
> log-likelihood 'not concave' for most sectors and is
> not converging.
>
> I am running the following command -
> xtfrontier  ydiffrnce kdiffrnce feqty_new1 if industry
> == i, tvd noconstant
>
> What should I do?
>
> Thanks and regards!
>
> Vinish Kathuria
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