Measuring technical efficiency in the stochastic varying coefficient frontier model
针对随机变系数前沿模型中基准技术可能不可行的问题，提出了基于最大似然法的产出导向和单要素技术效率新测度，实证发现两种测度的效率得分有显著差异但排名差异不大。
Abstract Due to the assumption that the best practice methods refer to each input separately instead of the whole set of inputs used by a firm, the benchmark technology as defined in the stochastic varying coefficient frontier model may be infeasible and theoretically improper whenever the maximum response coefficients are not coming from the same production unit. To overcome this problem, we propose alternative measures of output‐oriented and single‐factor technical efficiencies inspired from the maximum likelihood formulation of the nonneutral frontier model. The empirical results indicate that there are significant differences between the two in terms of the estimated efficiency scores but not significant differences we detected in terms of the efficiency ranking.