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凯恩斯之后,西方投资理论发展为基于投资的经济增长理论和经济发展理论,这是因为凯恩斯的投资理论仅仅属于短期稳定投资模型,将其发展为长期动态模型符合理论演进的内在逻辑。本文将按照理论发展的线索,首先阐述基于投资的经济增长理论及其模型,然后分析投资要素结构优化模型,最后阐释西方经济学家在投资要素贡献率的量化分析方面取得的进展。
After Keynes, western investment theory developed into an investment-based economic growth theory and economic development theory, because Keynes’s investment theory only belongs to the short-term stable investment model, the development of long-term dynamic model consistent with the inherent logic of theoretical evolution. Based on the clues of theoretical development, this article first elaborates the theory and model of economic growth based on investment, and then analyzes the structural optimization model of investment elements. Finally, it expounds the progress made by western economists in the quantitative analysis of the contribution rate of investment elements.