While corporate social performance (CSP) plays an increasingly important role in supply chain and operations management, measuring CSP has been an important yet challenging task facing academics and managers. The challenge mainly comes from the fact that stakeholder expectations (i.e., the...

Traditionally in data envelopment analysis (DEA), one LP must be solved for each observation to obtain its efficiency score. This note presents a consolidated DEA model and shows that it suffices to solve one consolidated LP to obtain the efficiency scores of all $n$ observations. The...

This paper reveals the unintended consequences of the two most widely cited and classical models for measuring environmental efficiency --- the hyperbolic efficiency model (HEM) and directional distance function (DDF). We prove the existence of three main problems: (1) these two models are not...