The result is a self-fulfilling prophecy, in which widespread unemployment does indeed drive the returns of those investments below zero. “We reach a condition where there is a shortage of houses,” Keynes wrote, “but where nevertheless no one can afford to live in the houses that there are.”
所产生的结果就是一个自我实现的预言，大规模的失业事实上导致那些投资的回报率低于零。“我们随后出现了住宅短缺的情况，”凯恩斯写到，“但即便如此就算有这些住宅也没人能承担得起”