关键词：
ECONOMISTS
MICROECONOMICS
PERFECT competition
EXTERNALITIES (Economics)
ECONOMICS
摘要：
The article presents a discussion on the contribution of economist Frank Knight's to the price theory. In his work on microeconomics during the first half of the 1920s, Knight dealt with a number of issues, among them the perfect competition theory, which he reformulated along Wairasian and Paretian lines; the form of the supply curve in the long run; and the Pigouvian doctrine of external economies, which he dismissed. He also suggested refinements to the theory of monopoly. Knight's revised doctoral dissertation, "Risk, Uncertainty, and Profit," was published in 1921. The book was immediately accepted by a great part of the international community of economists as a new and outstanding contribution to economic theory, and was very soon considered a classic. In it, Knight examined two principal issues--the definition of perfect competition and the treatment of risk and uncertainty. Traditionally the latter is identified as Knight's most important specific contribution to economic theory.
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