【作者(必填)】Christopher Cornwell；Peter Schmidt；Robin C. Sickles

【文题(必填)】Production frontiers with cross-sectional and time-series variation in efficiency levels

【年份(必填)】Journal of EconometricsVolume 46, Issues 1–2, October–November 1990, Pages 185-200

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/030440769090054W