Are labor unions good for workers and the economy?

Are Labor Unions Good for Workers and the Economy?

This is a genuinely contested question in economics—the evidence is mixed, and conclusions often depend on ideological starting points, time horizons, and which outcomes you weigh most heavily. Here's a balanced look at the research.

The case that unions help workers

Higher wages. The core, most robust finding is the "union wage premium." When economists control for worker characteristics and use regression discontinuity analysis comparing workplaces that barely voted to unionize against those that barely didn't, the causal wage boost lands around 10 to 15 percent, with larger effects for longer-tenured workers. Other estimates put the premium at a "union wage premium" that has historically fluctuated around 15–20%.

Reduced inequality. This is where unions' case is strongest. Trade unions reduce wage inequality, because the union wage premium is much larger for low-waged workers, and is modest or even negative further up the wage distribution. Research estimates that the erosion of collective bargaining was responsible for around a fifth of the rise in wage inequality among men in the 1980s, and declining unionization was responsible for 37% of the increase in inequality between the 90th and 50th percentiles of male workers between 1979 and 2017—more than half of that impact occurred because, as unions weakened, nonunion employers faced less pressure to offer higher wages.

Spillover effects. Unions' influence isn't confined to their own members. Research covering 1980 through 2010 found declining unionization accounted for roughly a third of the overall drop in average hourly wages during that period, with about two-thirds of that decline coming from weakened spillover pressure on nonunion employers.

Productivity—not clearly harmed. The claim that unions kill productivity is weaker than commonly assumed. In the leading meta-analysis, Richard B. Freeman, a Harvard labor economist, joined Hristos Doucouliagos and Patrice Laroche to examine more than 300 studies on unionization and productivity, concluding that unions do not, overall, reduce productivity, although there are variations across countries and industries. What unions clearly do affect is the distribution of gains: unionization often hurts corporate profitability by forcing companies to share more of their revenues with workers in the form of increased wages and benefits.

The case that unions can hurt the broader economy

Employment effects. This is the most consistent negative finding. The union effect on employment is theoretically more ambiguous, but empirically labelled as "the one constant" among the effects of unions: employment growth is two to four percent lower in firms with union bargaining. A state-level panel study similarly found that unions adversely affect unemployment rates and the growth rates of gross state product (GSP), productivity, and population, while increasing the rate of wage inflation, though the impact on the employment growth rate specifically was negative but not statistically significant.

Trade-offs between short- and long-term gains. Some research frames union power as a double-edged sword: US unions have historically secured short-run pay gains, but these victories often come at the expense of slower employment growth, fewer future job opportunities, reduced investment and productivity, and diminished firm growth and viability. The mechanism, according to this view, is that reducing labor union bargaining power can lower real wages without impacting unemployment in the short term, but over the long term, deregulation boosts firm profits, sparking greater market competition and new firm entry, which eventually drives down unemployment and restores wages.

A more conservative/libertarian critique goes further, arguing unions are net harmful: unions function as labor cartels, restricting the number of workers in a company or industry to drive up the remaining workers' wages, and they retard economic growth and delay recovery from recession. This view holds that unions benefit their members but hurt consumers generally, and especially workers who are denied job opportunities.

Where the macro-growth debate stands

Some researchers argue that unions, by raising wages for lower- and middle-income workers who spend a larger share of their income, actually support aggregate demand and growth. One account notes that by raising wages and reducing income inequality, unions also spur the nation's economic growth, and research has shown that the decline of unions may have contributed to slower economic growth and "secular stagnation." A 2021 U.S. Treasury report took a similar view, concluding that "a policy of strengthening unions" today could "support broader economic growth," with the report's author stating "there's not a tradeoff between supporting worker bargaining and supporting a strong and robust economy."

But results vary across institutional contexts. One cross-country IZA review cautions that if raised wages come at the expense of normal profits, this can damage the prospects of firms and employment growth—to the long-term detriment of all, while also noting that as union influence on wages has fallen, wage inequality has grown in many countries, perhaps to the detriment of most workers and employers alike.

Bottom line

There's fairly strong consensus that unions raise wages for their members and reduce wage inequality, with meaningful spillover benefits to nonunion workers, and that the productivity-harm narrative is weaker than often claimed. The genuinely contested terrain is employment and long-run growth effects—where studies diverge based on methodology, country, time period, and whether "powerful" or "aggressive" unions are examined versus more typical bargaining. In short: unions are good for the workers they represent and tend to reduce inequality, but their net effect on aggregate employment and long-run economic growth remains debated, with outcomes likely depending heavily on how union power is exercised and the broader economic institutions surrounding it.