Measuring labor-efficiency in post offices

Three methods of measuring technical efficiency are defined, and their results compared in an application to Belgian postal data. The first one is that of adjusting a Cobb-Douglas production frontier; the second is that of computing the convex hull of the data, a la Farrell; the third one is developed on the basis of the sole assumptions of input and output disposability. We conclude with an estimated average labor-efficiency of about 90%. (This abstract was borrowed from another version of this item.)