文章基本信息

标题：Modeling Unobserved Heterogeneity in New York Dairy Farms: One-Stage versus Two-Stage Models
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作者：Alvarez, Antonio ; del Corral, Julio ; Tauer, Loren W. 等
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：2012
页码：275-285
出版社：Food Distribution Research Society
摘要：Agricultural production estimates have often differentiated and estimated different technologies within a sample of farms. The common approach is to use observable farm characteristics to split the sample into groups and subsequently estimate different functions for each group. Alternatively, unique technologies can be determined by econometric procedures such as latent class models. This paper compares the results of a latent class model with the use of a priori information to split the sample using dairy farm data. Latent class separation appears to be a superior method of separating heterogeneous technologies and suggests that technology differences are multifaceted.
关键词：parlor milking system;stanchion milking system;latent class model;stochastic frontier