边际生产率是对生产函数的一阶导数,是指在各种产业中每多增加一单位的生产要素(如劳工资本等)所能增加的生产量。当边际生产率过低或接近零时,表示该产业的发展规模已经接近饱和,人力物力应转投向其他的产业。

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