The Legacy of Knut Wicksell to Capital Theory
回顾了维克塞尔在资本理论中的贡献，他通过四个模型研究生产的时间维度，并指出实际利率等于社会资本存量的边际生产率，但这一概念他未能完全掌握。
Abstract Wicksell's contributions to capital theory focused on stationary states in four distinct models intended to account for the time dimension of production in market economies. We now have a better understanding of the true challenges because of two developments: a full theory of intertemporal general equilibria and a methodology for comparative analysis as explained by Hicks. In Wicksell's equilibria, the real interest rate turns out to be equal to the marginal productivity of the volume of social capital, a concept that Wicksell could not master and hence avoided. Challenges remain, particularly regarding the best way to account for complementarities and substitutions over time.