Ranking Crop Yield Models: A Comment

Octavio Ramirez and Tanya McDonald

American Journal of Agricultural Economics, 2006, vol. 88, issue 4, 1105-1110

Abstract: This comment discusses key specification issues that may have affected the performance and, therefore, the ranking of parametric models that were compared in a recent AJAE article. A procedure to obtain the most flexible parametric model specification possible, given the particular probability distribution function on which the model is based is presented. These specifications also allow for standardized and, therefore, more valid comparisons across parametric models that are based on different probability distributions. Finally, the comment cautions against generalization of the rankings in that AJAE article and recommends that these more flexible specifications be adopted in future comparisons and applications. Copyright 2006, Oxford University Press.

Date: 2006
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