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Measuring and Decomposing Productivity Change: Stochastic Distance Function Estimation VS. DEA

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  • Lastrapes, W.D.

Abstract

Linear programming techniques have been widely used to compute Malmquist indices of productivity change as ratios of fitted distances from a convex hull frontier. These indices are then decomposed into technical and efficiency change. However, since this approach is non-stochastic, inference is problematic. Further, although the Malmquist index is valid for any degree of returns to scale, productivity change is measured relative to a constant returns to scale frontier. As an alternative, we propose a exible, stochastic input distance frontier which allows for statistical inference and imposes no restrictions on returns to scale. Using this distance frontier, we decompose productivity change into technical and efficiency change. Comparisons are drawn between the stochastic and non-stochastic methods based on a panel of electric utilities. We estimate our model by the generalized method of moments with a variety of instrument sets to gauge the sensitivity of productivity change calculations to changes in the underlying moment conditions.

Suggested Citation

  • Lastrapes, W.D., 2000. "Measuring and Decomposing Productivity Change: Stochastic Distance Function Estimation VS. DEA," Papers 99-478, Georgia - College of Business Administration, Department of Economics.
  • Handle: RePEc:fth:georec:99-478
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    Cited by:

    1. Scott Atkinson & Jeffrey Dorfman, 2005. "Multiple Comparisons with the Best: Bayesian Precision Measures of Efficiency Rankings," Journal of Productivity Analysis, Springer, vol. 23(3), pages 359-382, July.

    More about this item

    Keywords

    TECHNICAL CHANGE ; EVALUATION ; ECONOMIC MODELS;

    JEL classification:

    • C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - General
    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models

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