Are unions a net win for workers and the economy? I'll weigh the data on wages, growth, and competitiveness.
Labor unions have both benefits and costs for workers and the economy. Research generally finds clear gains for union members, spillover gains for other workers, but also potential trade-offs for employment, investment and growth - with effects depending on the type of union, bargaining structure, and labor market context.
1. Are unions good for workers?
Yes, for members and often for non-members in the same industry:
•Higher wages: Treasury Department's 2023 report on unions finds Unions raise the wages of their members by 10 to 15 percent. Other estimates find:
•Unionized workers earn 10.2% more than their non-union peers
•For the typical low-wage worker (10th percentile) unionization raises wages by almost 21%
•Studies summarized as unions have consistently provided a 10- to 20-percent wage boost over eight decades
•Better benefits and working conditions: Unions also improve fringe benefits and workplace procedures such as retirement plans, workplace grievance policies, and predictable scheduling. Other research notes unions reduce employee turnover and wage inequality, and increase access to sick pay and annual leave.
•85% of unionized workers have access to paid sick leave vs. 62% of non-union workers
•Reduced inequality and spillover effects:
•Unionization increases wages by 17.3% for Black workers and 23.1% for Latino workersand can reduce race and gender wage gaps by encouraging egalitarian wage practices
•Unionization also has spillover effects that extend well beyond union workers. Competition means workers at nonunionized firms see increased wages too. Heightened workplace safety norms can also pull up whole industries
Caveats for workers:
•The union wage premium has declined or disappeared since the 1980s due in part to global competition and technological changes, so the advantage is smaller today than in the mid-20th century.
•Research on 147 studies finds powerful unions using a monopoly face can limit job growth and employment opportunities even while raising pay, as firms respond by cutting hiring. Employment growth is two to four percent lower in firms with union bargaining.
•Strong job security and seniority rules can help insiders - usually longer-tenured employees - but harm outsiders (e.g., younger or new workers) by discouraging hiring
2. Are unions good for the economy?
Evidence is mixed and nuanced. Treasury and other researchers argue unions can help growth, while other economists find adverse aggregate effects.
Arguments and evidence that unions help growth:
•The Treasury report argues unions contribute to economic growth and resilience... by reducing overall inequality. Income inequality often feeds back into inequality of opportunity, which impedes growth if disadvantaged people cannot access the resources necessary to acquire job skills or start businesses
•Unions can boost businesses' productivity by improving working environments and by giving experienced workers more of an input into decisions that design better and more cost-effective workplace procedures
•More generally, the report concludes evidence challenges the view that worker empowerment holds back economic prosperity... unions can have a positive effect on productivity through employee engagement and union voice effects
•In the three decades after World War II (1945 to 1973), often referred to as the "Golden Age" of productivity and wage growth... strong unions, government investment in infrastructure and education, and widespread economic growth contributed... productivity grew ~97%, and real compensation grew ~91%
•Decline of unions has correlated with rising inequality: In the US, the decline in trade union membership rates since the late 1970s has corresponded to a rise in the income share of the top 1% and a period of stagnant real median wages.
Arguments and evidence that unions can harm growth:
•Other reviews conclude the overall evidence is overwhelming that labor unions in contemporary America have had harmful aggregate effects on the economy and unions are associated with lower rates of growth in income and jobs
•Studies of panel data from 48 U.S. states 1978-1994 found unions adversely affected the growth rates of... gross state product and productivity
•Companies facing excessive union demands often cut investments—particularly in R&D and long-term capital—reducing productivity and profitabilityand slightly increase the likelihood of a company closing.
•Case study of the Rust Belt: when the monopoly face dominates... companies respond to wage pressure by trimming R&D, cutting capital, reducing company growth, and ultimately shrinking jobs... dynamics that explain roughly 55 percent of the decline in the Rust Belt's share of manufacturing employment between 1950 and 2000
•In competitive labor markets, if trade unions are successful in pushing for higher wages, it can cause disequilibrium unemployment (real wage unemployment of Q3-Q2) and if unions go on strike and work unproductively (work to rule) it can lead to lost sales and output.
•Powerful unions were a significant cause of the UK's inflation rate of 25% in 1975 via wage-inflation, and research notes slower growth and higher unemployment in Europe with massive collective bargaining agreements.
3. When are effects more positive or negative?
Economists emphasize context:
•Monopsony vs. competitive markets: If firms have monopsony power, then a trade union can increase wages without causing unemployment. In highly competitive markets, pushing wages above equilibrium is more likely to create unemployment.
•Cooperative vs. adversarial relations: It also depends very much on the nature of the relationship between trade unions and employers. If relations are good and constructive, the union can be a partner... However, if the relationship... becomes confrontational, it can escalate into destructive partnerships which cause a decline in profitability.
•Moderate vs. monopolistic structure: U.S. unions tend to be more powerful and adversarial than those in countries such as Germany and the United Kingdom, largely due to labor laws and bargaining structures that generate monopolistic characteristics. Evidence suggests moderate labor union power, characterized by balanced demands, greater worker representation, and increased flexibility, can better preserve the benefits... while avoiding the downsides.
Bottom line: For individual workers, union membership is consistently associated with higher pay, better benefits, and greater job protections, with spillovers that can raise standards for non-union workers and reduce demographic wage gaps. For the economy as a whole, unions can reduce inequality and improve productivity through voice and engagement, but when bargaining is monopolistic and adversarial it is associated with slower employment growth, lower investment, and - in some studies - lower aggregate output and growth.