Directional distance functions data envelopment analysis method with endogenous direction for target setting
针对数据包络分析中方向距离函数难以确定合理改进方向的问题，提出一种内生方向机制，通过最小化决策单元与生产前沿面的距离来设定目标，并讨论了自由方向和单位不变性。
The determination of reasonable improvement direction is the key difficulty of directional distance functions in data envelopment analysis target setting method, but there is no consensus direction determination method at present. This paper introduces the concept of minimizing the distance between decision-making units (DMUs) and production frontier for constructing a new endogenous mechanism of improvement direction, and the corresponding target setting method is constructed to setting target for DMUs, which is used to minimize the total projection distance between DMUs and their targets. In addition, the free direction and unit invariant of improvement direction are discussed for meeting the diverse needs of decision makers.