Are labor unions good for workers and the economy?

It's genuinely contested — but the evidence shows clear benefits for workers, with more debated effects on the broader economy

For individual workers, the case is strong:

•Union workers earn significantly more than comparable non-union workers. On average, a worker covered by a union contract earns 12.8% more in wages than a peer in a nonunionized workplace in the same industry with a similar education, occupation, and level of experience. The U.S. Treasury Department similarly found that the evidence from these two approaches points to a union wage premium of around 10 to 15 percent, with larger effects for longer-tenured workers.

•Unions historically compressed wage inequality: until the 1970s the dominant view was that unions tended to increase wage inequality, but using micro data, Freeman (1980) showed that the inequality-reducing effects of unions were quantitatively larger than the inequality-increasing effects.

•The decline of unions appears linked to rising inequality: looking at the effect of union density on rising wage inequality, the decline of unions from 1973 to 2007 explains up to one-third of rising wage inequality among men and one-fifth among women.

•Benefits extend beyond members. As wages, benefits and working conditions improve for unionized workers, they also improve for nonunionized employees, as other workers see increases in wages and improved work practices as their nonunionized workplaces compete with unionized ones for labor.

•Unions are also tied to broader social goods: workplace safety and health outcomes, reduced racial resentment, and higher civic/democratic participation.

On productivity and firm-level effects, the picture is more mixed than critics claim:

•A major meta-analysis found examining more than 300 studies on the effects of unionization on productivity, researchers concluded that unions do not, overall, reduce productivity, although there are variations by country and industry, with unionization associated with higher productivity in education and construction in the U.S.

•However, studies have found that unionization often hurts corporate profitability by forcing companies to share more of their revenues with workers in the form of increased wages and benefits.

On jobs, investment, and macroeconomic growth, the debate is real:

The skeptical/critical view (e.g., Heritage Foundation, some Mercatus research):

•Economic theory suggests that unions raise the wages of their members at the cost of lower profits and fewer jobs, that lower profits cause businesses to invest less, and that unions have a smaller effect in competitive markets.

•Studies show that powerful labor unions can bring about slower employment growth and fewer jobs for unionized workers and can reduce company investments in R&D and long-lived tangible capital.

•The Rust Belt is often cited as a cautionary case: an in-depth case study of the Rust Belt illustrates how unions wielding monopoly privileges and fueling strikes and conflicts were responsible for 55 percent of the decline in the Rust Belt's share of US manufacturing employment, though this is attributed specifically to adversarial, monopolistic union models rather than unions per se.

•Seniority rules can also create insider/outsider effects: powerful labor unions can reduce labor turnover and mobility through job security clauses and seniority promotions, which help union "insiders" but harm "outsiders" by discouraging hiring.

The pro-union/macro view (e.g., U.S. Treasury, EPI, CAP):

•Increased unionization has the potential to contribute to the reversal of the stark increase in inequality seen over the last half century, and reducing inequality can promote economic resilience by making lower-income Americans less sensitive to negative income shocks—in short, unions can promote economy-wide growth and resilience, challenging the view that worker empowerment holds back economic prosperity.

•Unions can spur overall economic productivity by improving working environments and giving experienced workers more input into decisions that design better and more cost-effective workplace procedures.

A reasonable synthesis that several researchers converge on: the effect depends heavily on how union power is exercised. Moderate union power strikes a balance — unions that pursue balanced demands over time are more likely to sustain long-term benefits for both workers and companies, whereas adversarial, monopoly-style bargaining can backfire for everyone, including workers, in the long run. Similarly, while stronger union power can bring long-term drawbacks tied to exclusive representation and limited competition, unions can have more positive long-term impacts in systems that allow increased flexibility in collective bargaining, greater worker choice, and more balanced demands.

Bottom line: The evidence is quite robust that unions raise pay and benefits for their members and reduce wage inequality, with spillover benefits to non-union workers. The effects on overall economic growth, jobs, and firm investment are more contested and seem to depend on union behavior, bargaining structure, and market competitiveness rather than being uniformly positive or negative. This is why unions remain a genuinely live political and economic debate rather than a settled question.

Citations (15)

1epi.orgNonprofits and think tanks
Unions aren’t just good for workers—they also benefit communities and democracy | Economic Policy Institute
Source excerpt: “On average, a worker covered by a union contract earns 12.8% more in wages than a peer in a nonunionized workplace in the same industry with a similar...”
2treasury.govGovernment
Labor Unions and the U.S. Economy | U.S. Department of the Treasury
Source excerpt: “All in all, the evidence from these two approaches points to a union wage premium of around 10 to 15 percent, with larger effects for longer-tenured w...”
3berkeley.eduAcademic
1 Unions and Wage Inequality DAVID CARD
Source excerpt: “Until the 1970s the dominant view was · that unions tended to increase wage inequality (Johnson, 1975). Using micro data on individual workers · in th...”
4americanprogress.orgNonprofits and think tanks
4 Ways Unions Make Our Economy and Democracy Stronger - Center for American Progress
Source excerpt: “As Bruce Western of Harvard University and Jake Rosenfeld of the University of Washington found when looking at the effect of union density on rising ...”
5afscme.orgNonprofits and think tanks
U.S. Treasury Department: nation’s economy would benefit from stronger labor unions | American Federation of State, County and Municipal Employees (AFSCME)
Source excerpt: “As wages, benefits and even working conditions improve for unionized workers, they also improve for nonunionized employees. “Importantly, the positive...”
6tcf.orgNonprofits and think tanks
How Unions Work for the Economy
Source excerpt: “In what is probably the leading study on the issue, Richard B. Freeman, a Harvard labor economist, joined Hristos Doucouliagos and Patrice Laroche to ...”
7tcf.orgNonprofits and think tanks
How Unions Work for the Economy
Source excerpt: “Yet many academic studies contradict that notion and have found that unions do not hurt productivity. (Studies have found, however, that unionization ...”
8heritage.orgNonprofits and think tanks
What Unions Do: How Labor Unions Affect Jobs and the Economy | The Heritage Foundation
Source excerpt: “Economic theory consequently suggests that unions raise the wages of their members at the cost of lower profits and fewer jobs, that lower profits cau...”
9mercatus.orgNonprofits and think tanks
Do More Powerful Unions Generate Better Pro-Worker Outcomes? | Mercatus Center
Source excerpt: “Looking to the cost side of powerful labor unions, studies show that powerful labor unions can bring about slower employment growth and fewer jobs for...”
10mercatus.orgNonprofits and think tanks
Do More Powerful Unions Generate Better Pro-Worker Outcomes? | Mercatus Center
Source excerpt: “We also look at an in-depth case study of the Rust Belt that illustrates how unions wielding monopoly privileges and fueling strikes and conflicts wer...”
11mercatus.orgNonprofits and think tanks
Do More Powerful Unions Generate Better Pro-Worker Outcomes? | Mercatus Center
Source excerpt: “Moreover, powerful labor unions can also reduce labor turnover and mobility through job security clauses and seniority promotions, which help union “i...”
12treasury.govGovernment
Labor Unions and the U.S. Economy | U.S. Department of the Treasury
Source excerpt: “Increased unionization has the potential to contribute to the reversal of the stark increase in inequality seen over the last half century. In turn, i...”
13afscme.orgNonprofits and think tanks
U.S. Treasury Department: nation’s economy would benefit from stronger labor unions | American Federation of State, County and Municipal Employees (AFSCME)
Source excerpt: ““And unions can spur overall economic productivity by improving working environments and giving experienced workers more of an input into decisions th...”
14mercatus.orgNonprofits and think tanks
Do More Powerful Unions Generate Better Pro-Worker Outcomes? | Mercatus Center
Source excerpt: “Moderate union power strikes a balance. Unions that pursue balanced demands over time are more likely to sustain the long-term benefits for both worke...”
15mercatus.orgNonprofits and think tanks
Do More Powerful Unions Generate Better Pro-Worker Outcomes? | Mercatus Center
Source excerpt: “While stronger union power can bring long-term drawbacks—such as reduced economic efficiency, lower firm output, and decreased employment—these effect...”