Pseudolikelihood estimator of the \(\lambda\) parameter
fan(lambda_fan, resp, Ey, ineffD)the \(\lambda=\sigma_u/\sigma_v\) parameter to be estimated
the single response variable Y observed
the conditional expectation estimate obtained in the first step of the algorithm
logical: TRUE for estimating a production function, FALSE for estimating a cost function; this is done for usage compatibility with frontier package
Estimated \(\lambda\) parameter
Fan, Y., Li, Q., Weersink, A., 1996. Semiparametric estimation of stochastic production frontier models. Journal of Business & Economic Statistics 14:460-468