Pseudolikelihood estimator of the \(\lambda\) parameter
fan(lambda_fan, resp, Ey, ineffD)
Estimated \(\lambda\) parameter
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
Giancarlo Ferrara and Francesco Vidoli
Fan, Y., Li, Q., Weersink, A., 1996. Semiparametric estimation of stochastic production frontier models. Journal of Business & Economic Statistics 14:460-468