拗折需求線理論史與經濟學方法論

本文回顧拗折需求線理論史，並分別探討三種最具影響力的經濟學方法論主張－工具主義、先驗方法、與證偽主義－所提供的理論評價標準是否能夠說明此一經濟思想史中的重要事件。我們在拗折需求線理論史中發現經濟學家相當重視拗折假設的真實性，而這意味著他們採取與工具主義相當不同的理論評價標準。除此之外，雖然實證測試一再否定拗折需求線理論的預測結果，但是經濟學界在1980年代以前仍然普遍接受此一理論，這個現象明顯與證偽主義不符。我們相信拗折需求線理論史正反映出先驗方法對於經濟學思維與經濟學教育的深遠影響。

關鍵字

拗折需求線；工具主義；先驗方法；證偽主義

並列摘要

This paper investigates the history of kinked demand curves. Different criteria of appraisal provided by the three most influential schools of economic methodology-instrumentalism, a priori methodology, and falsificationism-are used to explain the success and decline of kinked demand curves in economics. We find that in the history of kinked demand curves economists put much emphasis on the reality of assumptions and adopt criteria of appraisal quite different from instrumentalism. We also find that although the predictions of kinked demand curves are repeatedly rejected by empirical tests, most economic textbooks still accept this theory as the standard explanation of price rigidity. This historical fact is obviously inconsistent with falsificationism. We believe that the puzzling phenomena found in the history of kinked demand curves reflect the profound influence of a priori methodology on economics.

並列關鍵字

kinked demand curves ； instrumentalism ； method a priori ； falsificationism

參考文獻

Awh, R. Y., Primeaux, W. J.(1992).A more general theory of kinked demand curve: theory and empirical test.Quarterly Review of Economics and Finance.32(4)