[Limdep Nlogit List] cml with latent class frontier model

Giovanni Trovato giovanni.trovato at uniroma2.it
Fri Sep 25 01:44:22 EST 2009

dear limpders,

I employ a latent class cost frontier  model in wich I need to specify 
some constraint to assure the necessary corvature requirements.
I write so the lines

Frontier; Lhs=LNCN; Rhs=x
           ;cml: b(3)+b(4)=1, b(10)=0, b(11)+b(12)=0, b(23)+b(24)=1, b(32)=0, b(33)+b(34)=0
           ;pds=_groupti; pts=2; group=g2cob; res=latu; cprob=probcob$

The parameters are 22 (lambda and sigma included) for fixed SFM and 46 
for Latent Class with two groups (lambda, sigma and the two class 
probablities included).

When I run the command  the procedure does not get any kind of results.

Where are my errors?

Thank you

Giovanni Trovato
Dept. of Economics and Institution
University of Rome "Tor Vergata"
Via Columbia, 2
I - 00133 Rome - Italy 
tel +39 0672595649
fax +39 062020687

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