It has been held that when economic policy makers use economic models, there is a one way flow of information from the models to policy analysis. This text challenges this assumption, recognizing that in practice the requirements and questions of policy makers play an important role in the development and revision of those very models.

It has been held that when economic policy makers use economic models, there is a one way flow of information from the models to policy analysis. This text challenges this assumption, recognizing that in practice the requirements and questions of policy makers play an important role in the development and revision of those very models.