在过去半个世纪中,西方大部分资本主义国家在经济方面都经历了剧烈的变化。三十年代的大规模失业,到了五十年代和六十年代初,被件随着爬行型通货膨胀的近乎充分就业所取代,更近一些时候,我们已面临爬行型通货膨胀(“爬行”的速率较前为高)与就业不充分并存的黯淡局面。现在,在某种程度上,也许可以认为,经济理论的目的是解释并预测 For the past half century, most of the western capitalist countries have undergone drastic changes in the economy. Large-scale unemployment in the 1930s was replaced by nearly full employment with creeping inflation by the 1950s and early 1960s, and more recently we have been facing creeping inflation (“crawling ”Higher than the previous rate) and employment bleak bleak situation. Now, to some extent, it may be argued that the purpose of economic theory is to explain and predict