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Report
U.S. Market Concentration and Import Competition
A rapidly growing literature has shown that market concentration among domestic firms has increased in the United States over the last three decades. Using confidential census data for the manufacturing sector, we show that typical measures of concentration, once adjusted for sales by foreign exporters, actually stayed constant between 1992 and 2012. We reconcile these findings by linking part of the increase in domestic concentration to import competition. Although concentration among U.S.-based firms rose, the growth of foreign firms, mostly at the bottom of the sales distribution, ...
Briefing
Diverging Trends in Market Concentration
Researchers at the University of Chicago and the Richmond Fed uncover a paradoxical trend of rising national market concentration and falling local concentration across major economic sectors. Top firms — often thought to displace local businesses — are found to instead accelerate this divergence by enhancing (rather than stifling) local competition upon entry. This challenges prevailing narratives that top firms wield the market power to negatively impact consumer welfare by geographically expanding.
Discussion Paper
Has Market Power of U.S. Firms Increased?
A number of studies have documented that market concentration among U.S. firms has increased over the last decades, as large firms have grown more dominant. In a new study, we examine whether this rising domestic concentration means that large U.S. firms have more market power in the manufacturing sector. Our research argues that increasing foreign competition over the last few decades has in fact reduced U.S. firms’ market power in manufacturing.
Working Paper
Automation, Market Concentration, and the Labor Share
Since the early 2000s, a rising share of production has been concentrated in a small number of superstar firms. We argue that the rise of automation technologies and the cross-sectional variation of robot use rates have contributed to the increases in industrial concentration. Motivated by empirical evidence, we build a general equilibrium model with heterogeneous firms, endogenous automation decisions, and variable markups. Firms choose between two types of technologies, one uses workers only and the other uses both workers and robots subject to an idiosyncratic fixed cost of robot ...
Working Paper
Should the government sell you goods? Evidence from the milk market in Mexico
Governments spend considerable resources providing goods directly. We show that such behavior may increase welfare when private suppliers have market power. We do this by studying the staggered rollout of hundreds of government milk “ration stores” in Mexico using a proprietary panel of household food purchases. The rollout lowered the price per liter of privately supplied milk by 2.4% and increased household consumption. To compare directprovision with budget-neutral alternatives, we develop and estimate an equilibrium model of the market that accounts for quality differences. Direct ...
Journal Article
Concentrating on Market Concentration
At the Richmond Fed Highlighted Research: "Diverging Trends in National and Local Concentration." Esteban Rossi-Hansberg, Pierre-Daniel G. Sarte, and Nicholas Trachter. Federal Reserve Bank of Richmond Working Paper No. 18-15R, September 2018 (revised February 2019).
Working Paper
The "Matthew Effect" and Market Concentration: Search Complementarities and Monopsony Power
This paper develops a dynamic general equilibrium model with heterogeneous firms that face search complementarities in the formation of vendor contracts. Search complementarities amplify small differences in productivity among firms. Market concentration fosters monopsony power in the labor market, magnifying profits and further enhancing the output share of high-productivity firms. The combination of search complementarities and monopsony power induce a strong "Matthew effect" that endogenously generates superstar firms out of uniform idiosyncratic productivity distributions. Reductions in ...