In Data Envelopment Analyses (DEA) of fossil-fuel electricity generating plants, the most common input measures are installed generator capacity (as a proxy for capital), number of employees (as a proxy for labor), and BTUs of fuel (as a proxy for energy). However, these three inputs cannot be...

This paper examines transport modes that have employed Data Envelopment Analysis (DEA). It ascertains whether key DEA specifications necessary for estimating valid efficiency scores are present, the impact on the scores when they are not, and methods for correcting the errors. One critical...