We collect data on the size distribution of U.S. businesses for 100 years, and use these data to estimate the concentration of production (e.g., asset share or sales share of top businesses). The data
Supplementary material for "Business Size, Development, and Inequality: A Tale of One Tail" (2025) by Marcela Eslava, Marcela Meléndez, Laura Tenjo, and Nicolás Urdaneta. Econometric Society Monograph
