Alternative Technical Efficiency Measures: Skew, Bias, and Scale

Alternative Efficiency Measures for Multiple-Output Production

This paper has two main purposes. Firstly, we develop various ways of defining efficiency in the case of multiple-output production. Our framework extends a previous model by allowing for nonseparability of inputs and outputs. We also specifically consider the case where some of the outputs are undesirable, such as pollutants. We investigate how these efficiency definitions relate to one anothe...

Comparing Input- and Output-Oriented Measures of Technical Efficiency to Determine Local Returns to Scale in DEA Models

This paper shows how one can infer the nature of local returns to scale at the inputor output-oriented efficient projection of a technically inefficient inputoutput bundle, when the inputand output-oriented measures of efficiency differ. Journal of Economic Literature Classification: D2, C6

Bias-corrected estimators of scalar skew normal

One problem of skew normal model is the difficulty in estimating the shape parameter, for which the maximum likelihood estimate may be infinite when sample size is moderate. The existing estimators suffer from large bias even for moderate size samples. In this paper, we proposed five estimators of the shape parameter for a scalar skew normal model, either by bias correction method or by solving...

Direct and Indirect Measures of Attention Indicate a Bias Toward Cues in Methamphetamine Users

Introduction:This study aims to investigate the attentional bias toward drug-related stimuli along with subjective craving after encountering such stimuli in methamphetamine users. Studies of cue reactivity have confirmed bias in attention and gaze to drug-related stimuli for most substances, but methamphetamine drugs are less studied by a direct measure such as eye tracking. Methods:Thirty ma...

When Bias Kills the Variance: Central Limit Theorems for DEA and FDH Efficiency Scores: Technical Appendix