Twenty Years of Rising Inequality in U.S. Lifetime Labour Income Values
通过构建现值生命周期指标，发现过去20年美国终身劳动收入不平等增幅与年度收入不平等相同，但路径不同，且主要受收入流动性和收入分布变化驱动。
In this paper we study the evolution of lifetime labour income inequality by constructing present value life cycle measures that incorporate both earnings and employment risk. We find that, even though lifetime income inequality is 40% less than earnings inequality, the total increase in lifetime income inequality over the past 20 years is the same as earnings inequality. While the total increase is the same, the pathways there differ with earnings inequality experiencing a steady increase and lifetime income inequality increasing in spurts particularly in the latter half of the 1990s. Finally, we find the changes in lifetime income inequality are primarily driven by changes in earnings mobility and changes in the earnings distribution itself, changes in employment risk and the composition of the sample, such as the shift toward attaining more education and the ageing population, do not play a large role. Copyright 2004, Wiley-Blackwell.