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发展经济学将人均产出低于1980年人均产出2 000美元水平的经济的结构和行为作为研究对象。这个分界线是偏高还是偏低,在本文中都是无关紧要的。对精确性的追求会使我们在克拉维斯美元(Kravis dollars)之间徘徊——或使我们为了其他的指标而放弃美元:比如我喜爱的选择,即农业中需要的用于养活全部人口的劳动力的比例;或者是对创业潜能比较模糊的衡量。这些差异并不重要,所以我们不需要追究这些。
Developmental economics takes as its object the structure and behavior of the economy whose per capita output is below the level of $ 2,000 per capita output in 1980. Whether this dividing line is high or low is irrelevant in this article. The pursuit of precision will keep us hovering between Kravis dollars - or may we abandon the dollar for other indicators: for example, my favorite choice, which is needed in agriculture to feed the entire population The proportion of the workforce; or a rather vague measure of the entrepreneurial potential. These differences are not important, so we do not need to pursue these.