After years on the fringes of mainstream economics, the idea that employers can suppress wages through market power is stepping into the spotlight. Researchers are finding fresh evidence of monopsony across industries, and a new book argues it is central to the rise in inequality. The debate is moving from academic papers to policy rooms as regulators, courts, and companies weigh the costs and benefits of concentrated hiring power.
For decades, economists gave short shrift to the idea of monopsony — a power employers can have to suppress wages. Now a wave of research suggests it’s everywhere, and a new book argues it’s key to understanding today’s inequality.
Revival of a Once-Dismissed Idea
Monopsony describes a market where buyers—in this case, employers—hold sway over pay and working conditions. Classic models long treated labor markets as competitive, assuming workers could readily move to higher-paying jobs. That view helped shape policy and court rulings, which often focused on consumer prices rather than worker pay.
Over the past decade, this assumption has been tested. As job-switching rates fell and large firms expanded their reach, economists began to study how limited employer competition affects wages. Early work used online job postings to measure concentration. Later studies drew on detailed employer-employee data to track what happens to pay when hiring options narrow.
Evidence From Labor Markets
Several studies now link higher employer concentration with lower wages, even when productivity is similar. Research using millions of job postings found many local labor markets are highly concentrated, especially in rural areas and for specialized roles. Work on manufacturing plants showed that when employers merge or dominate hiring in a county, wage growth slows.
Minimum wage research also supports the presence of monopsony power. If employers already pay less than a competitive market would, a higher wage floor can lift pay without large job losses. Many recent studies report small to no employment effects from modest increases, suggesting firms had room to absorb higher pay.
Frictions such as noncompete clauses, anti-poaching agreements, and the costs of switching jobs can amplify employer leverage. Even where many firms exist on paper, barriers that keep workers from moving can produce monopsony-like outcomes.
Policy and Legal Shifts
Regulators have started to act. Antitrust enforcers have pursued wage-fixing and no-poach cases, arguing that collusion harms workers as much as consumers. In 2024, the Federal Trade Commission approved a rule to ban most noncompete agreements nationwide, citing evidence that such clauses suppress wages and limit mobility.
State lawmakers are also moving. Several states restrict noncompetes for low- and middle-income workers. Others require pay transparency in job postings to reduce information gaps that weaken worker bargaining.
- Federal actions: enforcement against wage-fixing and a broad noncompete ban.
- State measures: limits on noncompetes and pay transparency rules.
- Litigation: lawsuits challenging no-poach practices in franchise systems.
Skeptics and Open Questions
Not everyone agrees monopsony is “everywhere.” Critics argue that measuring concentration by job postings or county borders can overstate employer power. They note that remote work and online platforms expand workers’ options, at least in some fields. Some studies find that while concentration can lower wages, the effects vary widely by industry and skill level.
Business groups warn that sweeping rules could reduce investment or training if firms cannot retain employees. They caution that bans on noncompetes may shift firms toward other restrictions, like training repayment agreements, unless policy closes those gaps.
Inequality and What Comes Next
The new book highlighted by researchers contends that monopsony helps explain wage inequality across and within firms. If large employers can set pay below worker value, the gains from productivity flow to profits and top earners rather than broad wage growth. That lens links labor market structure to trends in the wage share of income and the premium paid by dominant firms.
Several developments will shape the next phase. Courts will decide the fate of federal noncompete rules. Unions are testing new organizing strategies in logistics, health care, and tech. Data transparency is improving, giving policymakers and workers clearer views of local hiring power.
For now, the research case that employer power depresses wages is stronger than it was a decade ago. The policy response is building, but the effects will depend on enforcement and how firms adapt. Readers should watch court rulings on noncompetes, antitrust actions in labor markets, and whether worker mobility—and pay—begin to rise as the rules change.
