Changes in Earnings Inequality: The Role of Demand Shifts
探讨自1970年代末以来，高技能劳动力相对需求持续上升这一公认事实，分析其与收入不平等加剧的关系，并指出该趋势自1940年已存在，对理解需求转变和不平等成因有启示。
That the relative demand for labor in the upper segment of the skill distribution has been shifting is a widely accepted ‘stylized fact’ in the literature on the increase in earnings inequality that has occurred since the late 1970s. Explanations of the causes of the relative demand shifts range from effects of increased integration of the world economy to skill-based technological change (reflecting, in part, the computerization of production processes). However, relative demand for skilled labor has been increasing fairly steadily since 1940, a fact having implications about the causes of both the demand shifts and recent increases in inequality.