The Espresso Index

Paper · 2003 · intermediate level

Income Inequality in the United States, 1913–1998

Thomas Piketty, Emmanuel Saez

Venue
Quarterly Journal of Economics, 118(1), 1–39
DOI
10.1162/00335530360535135
Link
publisher / source page

~3,471 citations

Source: Semantic Scholar API (corpus ID 154860564) · verified 2026-07-20. Counts drift daily and differ by database; treat as a dated snapshot.

In plain language

Used U.S. tax records back to 1913 to show top income shares fell sharply from the Depression through WWII, then climbed steadily back up starting around 1980.

Technical summary

Built the first long-run, high-frequency U.S. top-income-share series from individual tax-return data, revealing a U-shaped pattern and attributing the mid-century decline partly to permanent capital-income shocks under progressive taxation.

Key takeaways

  • Created the modern 'top incomes' subfield using tax data instead of survey data, which undersamples the rich.
  • Empirical backbone for most subsequent U.S. inequality research, including Piketty's Capital in the Twenty-First Century.

Themes

Measuring Inequality

Related works

Cite (BibTeX) · Cite (RIS) · ← Library