Are labor unions good for workers and the economy?

Are Labor Unions Good for Workers and the Economy?

This is genuinely contested among economists, with research supporting both benefits and costs. Here's a balanced look at what the evidence shows:

Effects on Workers: Mostly Positive

Wage premium: Multiple studies find unionized workers earn more than comparable non-union workers. Gregg Lewis's 1985 survey of two hundred economic studies concluded that unions caused their members' wages to be, on average, 14–15 percent higher than wages of similarly skilled nonunion workers. More recent estimates vary—while simple comparisons find union workers typically make about 20 percent more than nonunion workers, more rigorous causal analysis points to a union wage premium of around 10 to 15 percent, with larger effects for longer-tenured workers.

Reducing inequality: Unions compress wages because the union wage premium is much larger for low-waged workers, and is modest or even negative further up the wage distribution. This effect extends beyond union members—each 1 percentage point increase in private-sector union membership rates translates to about a 0.3 percent increase in nonunion wages, with larger estimates for workers without a college degree.

Equity gains: Empirical studies have confirmed that unions have closed race and gender gaps within firms—one study finds the wage gap between Black and white women was significantly reduced due to union measures.

Non-wage benefits: Unions also improve working conditions. Unions improve fringe benefits and workplace procedures such as retirement plans, grievance policies, and predictable scheduling—contributing substantially to middle-class financial stability.

Effects on the Broader Economy: Genuinely Mixed

The case for benefit: Some economists argue unions help overall growth by reducing inequality. Inequality harms overall economic growth by putting more money into the hands of the very wealthy, who tend to save it, and less into lower- and middle-income people, who spend it and thus spur the economy. Notably, Lawrence Summers and Anna Stansbury have written that the decline in worker power, caused largely by union decline, may contribute to slower growth and "secular stagnation."

The case for harm: Other economists emphasize costs to firms and efficiency. Economists point out that unions constraining the labor market distort factor costs and create market inefficiencies, and most economists say the ability of unions to raise wages above competitive levels has a net negative impact on society. Research consistently shows unions are associated with lower profitability, capturing firm quasi-rents from capital and firm-specific advantages, which leads to reduced investment and subsequently lower employment and productivity growth.

Productivity—actually a wash: This is one area where the evidence is more resolved than the rhetoric suggests. Harvard economist Richard Freeman notes "about two-thirds of the studies show [improvement] and about one-third show there might be negatives... Your best guess would say it's a wash." A large international survey confirms this: a survey of more than 300 studies on the economic impact of unionisation concluded that unions do not, overall, reduce productivity, though unionisation does make businesses less profitable for owners.

Job effects—disputed: Critics argue unionization costs jobs. One perspective holds that a successful union reduces the number of jobs available of the kind it controls, so some people who would like such jobs can't get them. Other research using more rigorous causal methods finds smaller effects: using a regression discontinuity design comparing workplaces where union votes narrowly passed or failed, DiNardo and Lee (2004) find little impact of new unionisation on business survival, employment, output, productivity or wages.

The Bottom Line

The classic Freeman and Medoff analysis captures the tension well: their conclusion was that on balance, unionization appears to improve rather than harm the social and economic system, though they acknowledge unions have monopoly power they can use to raise wages above competitive levels.

For workers, the evidence is fairly clear: unions raise wages (especially for lower-paid and historically disadvantaged workers), improve benefits, and give workers more voice—though this typically comes at the cost of reduced employment opportunities at unionized firms and lower corporate profits.

For the broader economy, it depends heavily on what you weight: if you prioritize reducing inequality and boosting consumer spending power, unions look beneficial; if you prioritize firm-level investment, profitability, and labor market flexibility, unions look costly. There's also a timing dimension—some research suggests powerful unions increase wages in the short run but can lead to unemployment and reduced opportunities in the long run, while weakening union power can cause short-term wage decreases but longer-term gains in firm profits, competition, and eventual wage recovery.

Ultimately, this is less a question with a single "correct" answer and more one where your conclusion depends on which outcomes you prioritize (worker wages/equality vs. firm profitability/flexibility) and which time horizon you care about.