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 evidence supporting both benefits and costs. Here's a balanced look at what the research shows:

Effects on Workers

Wages: Unions reliably raise wages for their members. The union wage premium—the percent change in weekly earnings due to union membership—after controlling for factors like race, gender, age, occupation, and education, is around 10 percent for all workers. Other estimates run higher: a 1985 survey of two hundred economic studies concluded that unions caused members' wages to be, on average, 14–15 percent higher than similarly skilled nonunion workers, and a National Bureau of Economic Research study found a union wage differential of 18 percent, relatively stable from 1973 through 1995.

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. The decline in unionization has contributed substantially to the growth in wage dispersion. There's also evidence unions have narrowed demographic gaps—empirical studies have confirmed that unions have closed race and gender gaps within firms, with one study finding the wage gap between Black and white women was significantly reduced due to union measures.

Spillover effects: Benefits may extend 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.

Downsides for workers: Some research suggests unionization can cost jobs. Empirical studies on the correlation between unionization and employment growth report that unionization is associated with 2–4 percent reduced employment growth, though no causal evidence is available. One often-cited study found that employment among production employees drops by 11 percent two years after a successful union election, wages do not rise, and productivity falls — though this is a more pro-business-aligned source (Heritage Foundation) and its findings are contested by other researchers.

Effects on the Broader Economy

Productivity: The evidence here is genuinely mixed and varies by country/sector. A survey of more than 300 global studies found mixed evidence: in Britain union influence has reduced company productivity, while in the US unionization is associated with higher productivity in construction and education but makes no difference in manufacturing; in developing countries the overall effect is generally positive. A separate review of the "What Do Unions Do?" literature concluded that the claim that union effects are on average positive and substantial cannot be sustained, with subsequent evidence suggesting an average union productivity effect near zero.

Profits and investment: There's more consensus that unions reduce profits. A public corporation's expected profits fall by an average of 10 percent after its employees vote to unionize. This can have downstream effects: subsequent literature continues to find unions associated with lower profitability, taxing returns from firm quasi-rents arising from long-lived capital and firm-specific advantages—and lower profits can lead to reduced investment and, subsequently, lower employment and productivity growth. However, the same analysis notes there is little evidence that unionization leads to higher rates of business failure.

Macroeconomic growth: Some economists argue weaker unions have hurt overall growth through inequality effects. Numerous studies have found that unions spur the economy by reducing income inequality, since inequality harms growth by putting more money into the hands of the wealthy (who tend to save it) and less into lower- and middle-income people, who are more likely to spend it. Notably, Lawrence Summers and Anna Stansbury have argued that the decline in worker power, caused in large part by the decline of unions, may contribute to slower economic growth and "secular stagnation."

The productivity-pay gap: One striking data point often cited by union advocates: from 1948 to 1979, productivity and compensation rose at roughly the same rate, but in the four decades after 1979, as union density fell, productivity rose 3.9 times as fast as worker pay. Correlation here doesn't prove unions caused this, but it's part of the case made.

The Core Tension

Economists broadly frame it as a tradeoff: under classical labor-market theory, unions could reduce profit rates and weaken investment incentives, slowing productivity growth—but unions can also increase efficiency by increasing worker voice, countervailing employer market power, solving coordination problems, and increasing investment in worker skills.

Bottom Line

Ideologically-oriented sources tend to land on predictable conclusions (pro-labor organizations emphasize wage/equality gains; free-market-oriented think tanks emphasize job losses and cartel-like effects), so it's worth weighing multiple sources rather than any single one.