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社会保障与财富不平等趋势

Social Security and Trends in Wealth Inequality
The Journal of Finance · 2025 · Sylvain Catherine、Max Miller、Natasha Sarin

中文摘要

近期有影响力的研究表明,基于财富集中度指标,美国的财富不平等大幅上升,但这些指标明显排除了社会保险计划的价值。本文表明,在正确计入社会保障后,过去三十年中最高财富份额并未发生太大变化。这是因为社会保障财富从 1989 年的 7.2 万亿美元大幅增至 2019 年的 40.6 万亿美元,目前几乎占财富分布底层 90% 人群财富的 50%。这一发现在考虑因社保体系融资担忧而可能出现的税收与待遇调整后依然稳健。

Abstract

Recent influential work finds large increases in inequality in the United States based on measures of wealth concentration that notably exclude the value of social insurance programs. This paper shows that top wealth shares have not changed much over the last three decades when Social Security is properly accounted for. This is because Social Security wealth increased substantially from $7.2 trillion in 1989 to $40.6 trillion in 2019 and now represents nearly 50% of the wealth of the bottom 90% of the wealth distribution. This finding is robust to potential changes to taxes and benefits in response to system financing concerns.
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