文章认为，凯恩斯在货币工资富有刚性的假设下，通过提高价格水平、降低实际工资，解决非自愿失业问题的理论，只能在短期有效。
The Keynesian theory deals with the involuntary unemployment under the hypothesis of wages rigidity, suggesting that raising price and reducing the real wages can only be valid in a short-term.
第二章曾经论述刚性的高实际工资会增加失业。
Chapter 2 argued that rigid and high real wages contribute to increases in unemployment.
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