Society & Culture / Social Issues / Poverty & Inequality

he Peaks of Wealth- analyzes income tax data from over twenty countries over a century to explore

Top Incomes in the Long Run of History

Anthony B. Atkinson, Thomas Piketty, Emmanuel Saez

This academic paper, authored by Atkinson, Piketty, and Saez, analyzes income tax data from over twenty countries over a century to explore the evolution of income share among high-income groups throughout history. The paper first elucidates the methodological limitations of using tax statistics rather than traditional survey data, pointing out that this approach more accurately reveals the wealth concentration of the top 1% of the population. The core research finding is that global high-income concentration exhibits a significant **"U-shaped" or "L-shaped" trend**, declining sharply in the first half of the 20th century due to the two World Wars and the Great Depression, but showing a significant rebound in recent decades, particularly in English-speaking countries. The authors further demonstrate the profound impact of progressive taxation, changes in capital income, and political system shifts on wealth distribution, ultimately aiming to provide a macro-historical perspective and policy design basis for understanding inequality in modern economic growth.