Corn models in the classical tradition: P. Sraffa considered historically
考察了谷物模型的历史合理性与分析有效性，回顾相关争论，指出应基于物质产出比较逻辑，并展示李嘉图前后多种谷物模型如何解决农业利润率决定及其对整体经济的主导问题。
This paper deals with the historical plausibility and analytical validity of what has come to be termed the corn model. The ongoing debate is firstly reviewed. It is suggested that a definite answer should be based on the logic of the material-produce comparisons. Although these do not lead invariably to a sound application of the corn model neither do they constitute per se a sign of classicism. However, it is shown that before and after Ricardo, corn models of various sorts and logical stringency were developed in order to cope with the problem of (1) the determination of the rate of profit in the only basic sector of the economy, agriculture, independent of any valuation and (2) its primacy over the overall economy. Copyright 1991 by Oxford University Press.