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Stochastic frontier models with multiple time-varying individual effects

机译:具有多个时变个体效应的随机边界模型

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This paper proposes a flexible time-varying stochastic frontier model. Similarly to Lee and Schmidt [1993, In: Fried H, Lovell CAK, Schmidt S (eds) The measurement of productive efficiency: techniques and applications. Oxford University Press, Oxford], we assume that individual firms' technical inefficiencies vary over time. However, the model, which we call the "multiple time-varying individual effects" model, is more general in that it allows multiple factors determining firm-specific time-varying technical inefficiencies. This allows the temporal pattern of inefficiency to vary over firms. The number of such factors can be consistently estimated. The model is applied to data on Indonesian rice farms, and the changes in the efficiency rankings of farms over time demonstrate the model's flexibility.
机译:本文提出了一种灵活的时变随机边界模型。类似于Lee和Schmidt [1993,在:Fried H,Lovell CAK,Schmidt S(eds)中,《生产效率的度量:技术和应用》。牛津大学出版社,牛津],我们假设各个公司的技术效率低下会随时间变化。但是,该模型(我们称为“多个时变个体效应”模型)更为笼统,因为它允许多个因素确定公司特定的时变技术效率低下。这使得效率低下的时间模式随公司而变化。可以一致地估计这些因素的数量。该模型应用于印尼稻米农场的数据,随着时间的推移,农场效率等级的变化证明了该模型的灵活性。

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