On Protection and the Product Line: A Reply
回应Falvey（1979）关于从价关税与进口质量的论点，指出市场结构和偏好形式会影响该论点，且不依赖于消费者是否只购买一种品种。
This reply shows that both market structure and the form of preferences affect the argument by R. Falvey (1979) on ad valorem tariffs and the quality of imports. It does not depend on whether or not consumers are restricted to purchasing only one variety. Copyright 1992 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.