在财政刺激缺位的情况下，央行继续向易于产生泡沫的金融市场注入流动性 — — 而没有意识到它们无非是在重复20世纪30年代的“推绳子”政策（绳子只能拉不能推，指适得其反的政策 ） 。
Lacking fiscal stimulus, central bankers keep upping the ante by injecting more liquidity into bubble-prone financial markets – failing to recognize that they are doing nothing more than “pushing on a string” as they did in the 1930s.