Dynamic Concept of Returns to Scales and Its Characteristics on Production Frontier in Intersection Form

作     者：Quan-ling Wei Hong Yan 

作者机构：Institute of Operations Research and Mathematical Economics Renmin University of China Beijin 100872 China Department of Logistics The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 

出 版 物：《Acta Mathematicae Applicatae Sinica》 (应用数学学报（英文版）)

年 卷 期：2011年第27卷第3期

页      面：355-366页

核心收录：

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 13[艺术学] 08[工学] 082304[工学-载运工具运用工程] 080204[工学-车辆工程] 0802[工学-机械工程] 0701[理学-数学] 0823[工学-交通运输工程] 

基　　金：supported by the National Natural Science Foundation of China (No. 70531040 and 70871114) the 985 Research Grant of Renmin University of China supported by the Hong Kong CERG Research Fund PolyU 5515/10H and PolyU 5485/09H 

主　　题：DEA production possibility set returns to scale 

摘      要：This paper gives a dynamic concept and a new non-parametric method for evaluating returns to scale（RTS） of economic units with multiple inputs and *** is frequently noticed that when we increase the input of a decision making unit（DMU） with a certain status of RTS,different status of RTS is *** example,when we increase the input of a DMU with constant RTS under the traditional method,a decreasing RTS is often observed instead of the expected constant *** thus define the RTS of each DMU in both input expansion and contraction regions *** research starts from transferring the production possibility set into the intersection form,by giving the explicit linear inequality representation of production *** RTS structural characteristics of DMUs＇ on the production frontier are *** of RTS of those DMUs on the production frontier include increasing RTS,constant RTS,decreasing RTS,saturated RTS and evidence of *** and suficient conditions for RTS evaluation are *** definition and evaluation method given here provide more detailed economic characteristics of DMU for policy makers.