The authors show that even when drug tests are extremely accurate by conventional measures, under some circumstances they will yield a high “false accusation rate†(that is, a high percentage of those testing positive for drugs will not have drugs in their systems). For example, if a...

In recent years, performance measurement has become the focus of attention in a variety of public sector fields. Unfortunately, too little has been done to develop valid operational definitions of performance, or to identify the weaknesses and biases inherent m certain types of performance...

In a recent article in Management Science, Savas [Savas, E. S. 1978. On equity in providing public services. Management Sci. 24 (8, April) 800-808.] discusses performance measures in the provision of public services, states that it is difficult, but not impossible, to develop measures for...

This paper describes a statistical method for estimating data envelopment analysis (DEA) score confidence intervals for individual organizations or other entities. This method applies statistical panel data analysis, which provides proven and powerful methodologies for diagnostic testing and for...

In Data Envelopment Analysis (DEA) applications involving multiple inputs and outputs, inputs are aggregated into the total amounts of each type of input. For example, if input types 'labour' and 'capital' are used to produce multiple outputs, the total amount of labour used to produce all...

In Data Envelopment Analysis (DEA), the two-stage method is a popular procedure for accounting for exogenous influences on efficiency. With the conventional two-stage method, a DEA is first conducted using only traditional (endogenous) inputs and outputs. Then, the first-stage DEA scores are...