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新古典经济学Neocalssical Economics
19世纪70年代,英国人William Jevons(1835-1882)、奥地利人Carl Menger(1840-1921)、在瑞士的法国人Leon Walras(1834-1910)各自独立提出,商品的价值由消费者的边际效用决定,史称边际革命。从此消费者的需求成为经济学研究的重点。现在经济学已经放弃了价值这个不清晰的概念,只谈价格。1891年美国人John Bates Clark(1847-1938)发表论文《Distribution as Determined by a Law of Rent》,提出要素价格由要素对生产的边际贡献决定,从而把分配问题也统一进了价格形成问题。
古典政治经济学Classical Political Economy
首先解释名字。economy这个词来自希腊语,原意是家庭管理,加上了形容词political,就是指国家的管理。political economy起初是和其他社会科学混在一起的,不是门独立的学科,研究的是如何管理整个国家的财富。起初的主导理论是重商主义mercantilism,认为财富来自贸易,主张国家的政策目标应该是增加贸易顺差。