Heavy tailed but not Zipf: Firm and establishment size in the United States

Illenin Kondo, Logan Lewis and Andrea Stella

Journal of Applied Econometrics, 2023, vol. 38, issue 5, 767-785

Abstract: Heavy tails play an important role in modern macroeconomics and international economics. Previous work often assumes a Pareto distribution for firm size, typically with a shape parameter approaching Zipf's law. This convenient approximation has dramatic consequences for the importance of large firms in the economy. But we show that a lognormal distribution, or better yet, a convolution of a lognormal and a non‐Zipf Pareto distribution, provides a better description of the US economy, using confidential Census Bureau data. These findings hold even far in the upper tail and suggest that heterogeneous firm models should more systematically explore deviations from Zipf's law.

Date: 2023
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