Reducing Weight Flexibility in Data Envelopment Analysis
研究了数据包络分析中权重完全灵活导致的问题，即部分决策单元仅依赖少数输入输出被评估，并提出通过约束权重来限制这种灵活性，以单输入情形为例用地方税务部门数据说明。
This paper explores the consequences of total weight flexibility in data envelopment analysis (DEA) assessments of the efficiency of decision-making units, and it suggests one possible way of limiting such flexibility. It is suggested that total weight flexibility can lead to some decision-making units being assessed, in effect, on only a small subset of their inputs and outputs, while the rest of their inputs and outputs are all but ignored. Constraining the weights in DEA assessments overcomes this problem. The paper suggests one way in which constraints can be placed for the case where the decision-making units to be assessed use only a single input. The method is illustrated using data on local-authority rates departments. Finally, the paper discusses the interpretation and usefulness of the information obtained from DEA assessments involving weights constraints.