Modeling heterogeneity in production models: empirical evidence from individual farming in Poland
[Modellierung der Heterogenität der Faktorqualitäten in Produktionsfunktionen: Empirische Ergebnisse für landwirtschaftliche Familienbetriebe in Polen]
This discussion paper deals with the estimation of a random coefficient model. The virtue of this approach is that it considers firm heterogeneity, which conventional SFA models do not. Applying the model to Polish farms, the results indicate that the conventional random and fixed effect models overestimate the inefficiency score. In addition, the reasons for inefficiency are analyzed. It is shown that despite the fragmentation of Polish agriculture, there is no evidence for scale inefficiency. Moreover, inefficiency could partly be attributed to factors, which affect the management input and requirements on farms.
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