A few years later, Keynes proposed a fix to the problem. In The General Theory of Employment, Interest, and Money, Keynes explained how booms are created when “investments which will in fact yield, say, 2% in conditions of full employment are made in the expectation of a yield of, say, 6% and are valued accordingly.”
几年后，凯恩斯提出了问题的解决方法。在《就业、利息和货币的一般理论》一书中，凯恩斯解释了繁荣是如何建立的，“在充分就业情况下实际只能有，比如说，2%的投资收益率，但却被赋予了6%的预期收益率，并以此来进行估值。”在经济衰退期则相反，那些收益2%的投资却被视为“预期收益率小于零。”