Models for agricultural policy: The CARD example
综述了爱荷华州立大学农业与农村发展中心开发或正在构建的统计模型、编程模型及混合模型，并讨论了它们如何服务于不同用户的分析需求。
This article presents a survey of the models which have been developed, or are presently under construction, by the Center for Agricultural and Rural Development at the Iowa State University. Statistical models, several types of programming models and hybrid models, combining both approaches, are discussed in relation to the problems for the analysis of which they were constructed and in relation to the amount of detail, required to satisfy the different users of the model results.