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  • error 3200 in stochastic frontier

    Hi,
    I'm trying to estimate a stochastic frontier in a matched sample. The method used was entropy (Entropy reweighting to create balanced samples (Hainmueller, J. 2012)):

    ebalance tratamento sexo assist coop sefinanc urbano idade25 idade26a35 idade36a45 idade46a55 idade56a65 sabeler fundinc fundcomp exp1 exp1a5 exp5a10 , tar(1)

    However, when I use the weight generated in the pairing (_webal) in the stochastic frontier, the following error appears:
    sfcross lnvbp lnareatot lntrab lnins lncap [aweight=_webal] if tratamento==1, nolog

    sfcross lnvbp lnareatot lntrab lnins lncap mills mills2 [aweight=_webal] if tratamento==1, nolog

    (sum of wgt is 6.0790e+03)

    quadcross(): 3200 conformability error
    moptimize_util_sum(): - function returned error
    mopt__calluser_lf2(): - function returned error
    opt__eval_nr_lf2(): - function returned error
    opt__eval(): - function returned error
    _optimize_evaluate(): - function returned error
    _mopt__evaluate(): - function returned error
    _moptimize_evaluate(): - function returned error
    _moptimize_search(): - function returned error
    moptimize_search(): - function returned error
    moptimize(): - function returned error
    _Get_SoLuTiOn_and_PoSt_ReSuLt_cs(): - function returned error
    sf_est_cs(): - function returned error
    <istmt>: - function returned error
    r(3200);

    Do you have any idea how to solve the problem?
    Thank you very much!

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