Name File Type Size Last Modified
KMZ_topshares_R5.xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet 444.4 KB 06/02/2024 05:29:AM
agg_concent_R5.dta application/x-stata-dta 30.5 KB 06/02/2024 05:29:AM
agg_concent_adj_R5.dta application/x-stata-dta 8.3 KB 06/02/2024 05:29:AM
manufacturing_concent_R5.dta application/x-stata-dta 10.3 KB 06/02/2024 05:29:AM
sector_concent_R5.dta application/x-stata-dta 214 KB 06/02/2024 05:29:AM
sector_concent_lognorm_R5.dta application/x-stata-dta 25.2 KB 06/02/2024 05:29:AM
sector_concent_topN_R5.dta application/x-stata-dta 176.3 KB 06/02/2024 05:29:AM
sector_type_concent_R5.dta application/x-stata-dta 94.3 KB 06/02/2024 05:29:AM
subsector_concent_R5.dta application/x-stata-dta 182.5 KB 06/02/2024 05:29:AM
subsector_gran_concent_R5.dta application/x-stata-dta 55.8 KB 06/02/2024 05:29:AM

Project Description

Summary:  View help for Summary
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 show that concentration has increased persistently over the past century. Rising concentration was stronger in manufacturing and mining before the 1970s, and stronger in services, retail, and wholesale after the 1970s. The results are robust to different measurement methods and consistent across different historical sources. Our findings suggest that large firms have become more important in the U.S. economy for a long period of time.

Scope of Project

JEL Classification:  View help for JEL Classification
      E01 Measurement and Data on National Income and Product Accounts and Wealth; Environmental Accounts
      E23 Macroeconomics: Production
      L11 Production, Pricing, and Market Structure; Size Distribution of Firms
      L25 Firm Performance: Size, Diversification, and Scope
      N12 Economic History: Macroeconomics and Monetary Economics; Industrial Structure; Growth; Fluctuations: U.S.; Canada: 1913-
Geographic Coverage:  View help for Geographic Coverage US


Related Publications

Published Versions

Export Metadata

Report a Problem

Found a serious problem with the data, such as disclosure risk or copyrighted content? Let us know.

This material is distributed exactly as received from the data depositor. As of April 2026, depositors are required to submit study materials in accessible formats. ICPSR has not reviewed, checked, or processed this material. For additional information about the study, please contact the investigator(s) directly. If you have questions about the accessibility of materials distributed by ICPSR or require further assistance, please visit ICPSR's Accessibility Center.