Since 1950s , a series of such new economic phenomena as " mystery of modem economic growth " and " mystery of leontief , wassily " have posed great challenge to the traditional theories , particularly such basic economic hypothesis as capital homogeny and work force homogeny 二十世纪五十年代以来，一系列新的经济现象，如“现代经济增长之谜” 、 “里昂惕夫之谜”等对传统经济理论，尤其是资本同质、劳动力同质等经济学基本假设提出了严峻挑战。
