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异方差下的前沿估计与企业特定无效率测度AI 解读

The purpose of this paper is to illustrate a straightforward and useful method for addressing the problem of heteroscedasticity in the estmation of frontiers. A heteroscedastic cost frontier model is developed and estimated using bank cost data similar to that used by G. D. Ferrier and C. A. K. Lovell (1990). The authors' results show dramatic changes in the estimated cost frontier and in the inefficieny measures when accounting for heteroscedasticity in the estimation…

医疗需求证明监管与创新扩散：随机系数模型AI 解读

Abstract In this paper, we examine empirically the effect that certificate‐of‐need regulation by state health planning organizations has had on the speed of diffusion of a relatively new medical technology—haemodialysis. Specifically, we test the hypothesis that a requirement that investments be subject to certificate‐of‐need review has significantly slowed the rate of adoption of this particular treatment modality. In subjecting this hypothesis to empirical verification, we…