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一、关于有效需求不足问题 从1929年开始,资本主义世界爆发了空前的大危机(大萧条),3000多万人失业,1/3的工厂停产,整个经济倒退回了一战前的水平。在大萧条期间,经济停滞持续了近10年。凯恩斯认为,造成社会经济萧条的根本原因,是由于消费需求和投资需求构成的有效总需求不足造成的,即C+I不足。边际消费倾向(MPC)在0-1的范围内递减,从而导致消费需求不足,而决定投资需求的资本边际效率(MEC),在长期内也是递减的,又导
First, on the issue of insufficient effective demand Beginning in 1929, an unprecedented crisis (Great Depression) broke out in the capitalist world. More than 30 million people were unemployed. One-third of the factories were stopped and the entire economy returned to the pre-World War I level. During the Great Depression, the economy stagnated for nearly 10 years. Keynes believes that the root cause of the social depression is due to the insufficient total effective demand constituted by consumer demand and investment demand, namely, C + I is insufficient. Marginal propensity to consume (MPC) decreases in the 0-1 range, resulting in lack of consumer demand, and determining the capital cost of investment efficiency (MEC), in the long term is decreasing, and guide