At issue here is the oldest unresolved dilemma in economics: are market economies “naturally” stable or do they need to be stabilized by policy? Keynes emphasized the flimsiness of the expectations on which economic activity in decentralized markets is based.
在这里的有争议的问题是经济学最古老的未决两难问题：市场经济是“天然”稳定的，还是要由政策来稳定它？凯恩斯强调作为分散市场里的经济行为基础的预期的脆弱性。未来具有内在的不确定性，因此投资者心理也是易变的。