One legacy of Western Europe’s experience in the 1980’s is a rule of thumb: each year that lower labor-force attachment and reduced capital stock as a result of declining investment depresses production $100 billion below normal implies that productive potential at full employment in future years will be $10 billion below what would otherwise have been forecast.
西欧20世纪80年代的经验留给我们一条拇指规则：在任何一年，只要劳动力工作时间和资本存量因投资的下降而下降，从而导致产出比正常水平低了1 000亿美元，那么在未来年份中，充分就业的生产潜能就会比正常情况的预计值低100亿美元。