Nonparametric analysis of technology and productivity under non-convexity: a neighborhood-based approach

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• 作者：Jean-Paul Chavas (1)
  Kwansoo Kim (2)
  
  1. University of Wisconsin ; Taylor Hall ; Madison ; WI ; 53706 ; USA
  2. Seoul National University ; Seoul ; Korea
  
• 关键词：Technology ; Productivity ; Nonparametric ; Non ; convexity ; C6 ; D2 ; Q12
• 刊名：Journal of Productivity Analysis
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：43
• 期：1
• 页码：59-74
• 全文大小：501 KB
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• 刊物类别：Business and Economics
• 刊物主题：Economics
  Microeconomics
  Econometrics
  Operation Research and Decision Theory
  Accounting and Auditing
  
• 出版者：Springer Netherlands
• ISSN：1573-0441

文摘

This paper investigates the nonparametric analysis of technology under non-convexity. The analysis extends two approaches now commonly used in efficiency and productivity analysis: data envelopment analysis where convexity is imposed; and free disposal hull (FDH) models. We argue that, while the FDH model allows for non-convexity, its representation of non-convexity is too extreme. We propose a new nonparametric model that relies on a neighborhood-based technology assessment which allows for less extreme forms of non-convexity. The distinctive feature of our approach is that it allows for non-convexity to arise in any part of the feasible set. We show how it can be implemented empirically by solving simple linear programming problems. And we illustrate the usefulness of the approach in an empirical application to the analysis of technical and scale efficiency on Korean farms.