On the Role of Weight Restrictions in Data Envelopment Analysis
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- 作者：Francisco Pedraja-Chaparro ; Javier Salinas-Jimenez and Peter Smith
- 关键词：data envelopment analysis ; weight restrictions efficiency
- 刊名：Journal of Productivity Analysis
- 出版时间：1997
- 出版年：1997
- 期刊代码：12_0895562X
- 类别：eco
- 卷：8
- 期：2
- 页码：215-230
- 数据来源：sp
摘要
This paper examines the role that weight restrictions play in Data Envelopment Analysis (DEA). It is argued that the decision to include a factor (input or output) in a DEA model represents an implicit judgement that the factor has a non-trivial weight. It therefore seems perverse to allow DEA to assign a trivial weight to that factor in assessing the efficiency of a unit. There is therefore a strong case for imposing restrictions on factor weights. However, many existing methods of weight restriction are in practice unwieldy. This paper proposes an alternative approach we term contingent weight restriction which is both practical and intellectually consistent with the DEA philosophy. The paper explores the implications of alternative methods of weight restriction using simulated data from a well known production process.