Labor Market Power and Wage Setting

The textbook model assumes workers shop freely between employers, bidding wages up to the value of what they produce. Real labor markets deviate sharply: labor market power and wage setting reflects how employers control wages through geographic isolation, search costs, information asymmetry, and contractual constraints, allowing them to pay workers materially less than competitive levels.

Beyond textbook monopsony

Most economics students learn monopsony power as an extreme case: one firm is the sole employer in a town, so workers have nowhere else to go and accept low wages. Real labor markets are subtler. Even cities with dozens of employers in an industry can exhibit substantial employer wage-setting power, because finding a new job is genuinely costly and uncertain.

A worker evaluating a job change faces real frictions. Searching takes time—scanning job boards, interviewing, negotiating—that they could spend working. There’s uncertainty about whether the new job is as good as it seems before starting. Switching jobs may mean moving, losing seniority or retirement benefits, or retraining in firm-specific skills. These costs are real even if the worker is not literally trapped in one town.

An employer, by contrast, is looking at hundreds or thousands of wage-setting decisions. The employer knows the supply curve of labor in their market—how many people will apply at $20/hour versus $22/hour—and can set wages accordingly. This asymmetry in information and bargaining cost gives the employer power to set wages below the worker’s alternative value, even in a competitive-looking market.

How concentration matters

Labor market concentration—measured by the share of hiring concentrated among a few large employers—has risen in many U.S. industries over the past 20 years. In some metro areas, the top four employers account for 20%–40% of all hiring in an occupation.

High concentration amplifies wage-setting power. When there are only a handful of significant employers, each worker’s outside options are fewer, and employers can more easily coordinate (explicitly or implicitly) on wage levels. A worker laid off from a large hospital in a city where healthcare is dominated by two or three hospital systems faces a narrower band of wage offers. Even if that worker is productive enough to earn $70,000 at a competitive wage, the concentrated market might only offer $60,000.

Empirical research finds a clear correlation: in industries and regions with high labor market concentration, wage growth is lower even controlling for productivity and unemployment. When two hospital systems merge, local wage growth for nurses typically slows. When a tech giant sets up an office in a town, it often depresses wages for tech workers nearby—not because it’s unproductive, but because it becomes the dominant employer and can set wages.

Non-compete agreements and mobility

Non-compete clauses in employment contracts prohibit a worker from joining a competitor or starting a rival business for a specified period (often 6 months to 2 years) after leaving. They are less common at the bottom of the wage distribution but widespread for managers, engineers, and sales professionals.

Non-competes directly reduce a worker’s outside options. If an engineer with specific knowledge quits a aerospace firm and signs a non-compete, they cannot join another aerospace firm in the region for 18 months. Their alternatives are: find a job in a different industry (likely requiring retraining), move to another region, or wait out the restriction while unemployed. This dramatically reduces bargaining power, allowing the current employer to cut wages below competitive levels. Workers bound by non-competes accept lower wage increases because switching costs are legally enforced.

Studies of non-compete enforceability (which varies by state) show that in states where non-competes are more enforceable, wages are lower for affected workers, and workers have longer job tenure (because leaving is costly and doesn’t pay). Conversely, in states where courts refuse to enforce non-competes, wage growth accelerates for mobile workers.

Information asymmetry in wage setting

Employers typically know far more about labor market conditions than individual workers do. An employer conducting hundreds of hires annually understands the wage floor and ceiling in their market; they know what competitors pay, what types of workers are easy or hard to find, and what salary level yields acceptable applications.

A worker, by contrast, often has limited information about outside wage offers. They may not know what a competitor pays, whether similar roles are available elsewhere, or how their salary compares to market rates. This information gap allows employers to compress wages. An employer can tell a worker “the market rate for your skill is $55,000” when the true competitive wage is $65,000, and the worker—lacking better information—may accept.

Wage transparency policies (requiring employers to disclose pay ranges in job postings, or sharing compensation data internally) narrow this gap and are empirically associated with higher wages, especially for women and minorities. When workers know the market rate, they can negotiate harder and switch employers more effectively.

Cyclical and structural aspects of wage-setting power

Labor market power fluctuates with the business cycle. During booms, unemployment is low and workers have many alternatives, reducing employer power and accelerating wage growth. During recessions, unemployment is high, workers are desperate, and employers hold the upper hand, suppressing wages even for those who remain employed.

But there is also a structural, long-term component. Industry consolidation, the decline of unions, and the rise of non-competes have all trended upward over decades, so employer power has increased on average even during low-unemployment periods. A worker today has less bargaining leverage than a comparable worker in 1980, even if unemployment is similar, because they are more likely to be non-compete-bound, more likely to work for a consolidated firm, and less likely to be unionized.

Wage suppression and productivity

In competitive labor markets, workers should earn close to their marginal product of labor—the value they add to the firm. Wage-setting power allows employers to pay below that level. The gap between marginal product and wages paid is sometimes called “wage suppression” or a form of monopsony rent.

Empirical estimates suggest this gap is substantial. In industries with very high concentration and many non-competes, workers may earn 10%–20% less than their marginal product. This is why consolidation and non-compete enforcement are sometimes framed as anticompetitive practices—they reduce wages below competitive levels, even if they do not obviously harm consumer prices or final output.

Wage-setting power and inflation dynamics

Labor market power affects inflation. If workers cannot bargain effectively, they cannot push back against real wage erosion during inflation. Periods of high employer power are sometimes associated with wage stickiness—wages fail to rise even as prices increase, eroding real wages. Periods of low employer power (tight labor markets, rising unionization) see faster wage growth that can feed back into price inflation.

During the 1970s inflation, tight labor markets and strong unions gave workers substantial wage-setting power, contributing to wage-price spirals. In the 2010s, despite low unemployment, wage growth remained muted—partly because labor market concentration and non-competes constrained worker bargaining power even in a tight labor market.

See also