世界经济的增长已经显著放慢。继六十年代平均增长率超过5%以后,全球的经济增长在七十年代前半期降到4%;七十年代后半期降到3.5%;八十年代前半期下降到大约2%。一个中心问题是:这种急剧下降的根源究竟是经济增长的基础潜力发生了永久性变化,因而 The growth of the world economy has slowed significantly. After the average growth rate of more than 5% in the 1960s, the global economic growth dropped to 4% in the first half of the 1970s; to 3.5% in the second half of the 1970s to about 2% in the first half of the 1980s. A central question is: what is the root cause of such a sharp decline, and the underlying potential for economic growth has undergone a permanent change, and therefore