发表机构
Emory University; Research Institute for Economics and Business Administration, Kobe University(埃默里大学; 神户大学经济商业经营管理研究所)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文评论指出Bouchaud和Farmer的财富分布结果因使用时间平均而非横截面数据而低估不平等,修正后基尼系数升至0.883,但定量拟合和帕累托尾部结论不成立。
AI 中文摘要
Bouchaud 和 Farmer(2023)认为自我实现的信念能够产生现实的财富分布。他们报告的基尼系数、分位数和帕累托指数是基于250个日期上王朝层面财富的平均值计算的,而非基于横截面数据。修正估计目标后,他们的定性结果得到加强:当$N=1{,}000{,}000$个王朝时,期末横截面基尼系数为0.883而非0.7,中位财富为平均财富的0.0052而非0.39。因此,该模型产生了更多的不平等,但并未达到所报告的定量拟合。附录F分析了一个不同的过程,并未确立所声称的帕累托尾部或指数。
英文摘要
Bouchaud and Farmer (2023) argue that self-fulfilling beliefs generate a realistic wealth distribution. Their reported Gini coefficient, quantiles, and Pareto exponent are computed from dynasty-level wealth averaged over 250 dates, not from a cross section. Correcting the estimand strengthens their qualitative result: with $N=1{,}000{,}000$ dynasties, the terminal cross-sectional Gini is 0.883 rather than 0.7, and median wealth is 0.0052 rather than 0.39 of average wealth. The model therefore generates more inequality, but not the reported quantitative fit. Appendix F analyzes a different process and does not establish the claimed Pareto tail or exponent.
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