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从19世纪50年代起,特别是内战后,美国经济进入了迅猛发展时期。根据后来的测定,1869-1873年间,年均国民生产总值为91.1亿美元;到1912-1916年间,年均国民生产总值增为625亿美元(均按1929年价格计算),在45年间,增长近7倍!这一时期中,美国经济完成了从农业国向工业国的转变,工业生产超过英国而跃居世界首位。造成这一时期美国工业和经济高速增长的宏观原因是显而易见的:技术的进步,先是蒸汽动力后是电力的使用,提高了劳动生产率;农业的长期稳步发展,为
Since the 1950s, especially after the civil war, the U.S. economy has entered a period of rapid development. According to later tests, the average annual gross domestic product (GNP) was 9.11 billion U.S. dollars from 1869 to 1873. From 1912 to 1916, the annual GNP increased to 62.5 billion U.S. dollars (all based on 1929 prices) , An increase of nearly 7 times! During this period, the U.S. economy completed its transition from an agrarian country to an industrialized country, surpassing the United Kingdom in industrial production and ranking first in the world. The macro reasons for the rapid industrial and economic growth in the United States during this period are obvious: technological advancement, first of all, the use of electricity after steam power, and the improvement of labor productivity; the long-term and steady development of agriculture is