Productivity spillovers and human capital: A semiparametric varying coefficient approach. - Zhezhi Hou; Man Jin; Subal C. Kumbhakar (Eur. J. Oper. Res., 2020)

The GMM estimation of semiparametric spatial stochastic frontier models. - Zhezhi Hou; Shunan Zhao; Subal C. Kumbhakar (Eur. J. Oper. Res., 2023)