A Laplace stochastic frontier model |
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Authors: | William C Horrace Christopher F Parmeter |
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Institution: | 1. Syracuse University, Syracuse, New York, USA;2. University of Miami, Miami, Florida, USA |
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Abstract: | We propose a Laplace stochastic frontier model as an alternative to the traditional model with normal errors. An interesting feature of the Laplace model is that the distribution of inefficiency conditional on the composed error is constant for positive values of the composed error, but varies for negative values. A simulation study suggests that the model performs well relative to the normal-exponential model when the two-sided error is misspecified. An application to U.S. Airlines is provided. |
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Keywords: | Efficiency estimation Laplace distribution median stochastic frontier truncated Laplace distribution wrong skew |
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