Are labor unions good for workers and the economy?

This is a genuinely contested question in economics, with substantial research supporting both benefits and costs. Here's a balanced look at the evidence:

Benefits to workers

Higher wages. The union wage premium is well documented. One of the most cited benefits of unions is the "union wage premium," and simple comparisons find that union workers typically make about 20 percent more than nonunion workers. More rigorous studies controlling for worker characteristics find the union wage premium for all workers is 10 percent after accounting for factors like race, gender, age, occupation, and education.

Better benefits and safety. Union workers have greater access to critical fringe benefits such as retirement, medical benefits, and life insurance, and unions bring about better workplace grievance systems and improved workplace safety.

Spillover effects. Benefits aren't limited to union members. Unionization has spillover effects—competition means workers at nonunionized firms may see increased wages too, and heightened workplace safety norms can pull up whole industries.

Reduced inequality. Research finds that unions fuel equality, benefiting all demographic groups by reducing race and gender wage gaps through anti-discrimination measures and egalitarian wage practices.

Benefits to the broader economy

Productivity effects are more positive than commonly assumed. Despite the conventional wisdom that unions hurt efficiency, many academic studies contradict that notion and have found that unions do not hurt productivity. In fact, in the United States, unions generally have a positive impact on productivity, and this effect is particularly strong among manufacturing firms. This may work through "voice" effects: unions give employees methods to express their opinions, serving as avenues for workers to express wage and benefit preferences, and allowing employees to notify managers about inefficiencies within company policies and the production process.

Countering monopsony power. In many labor markets, employers have outsized bargaining power. There is a pervasive lack of competition across the labor market—known as monopsony—that leads to suboptimal wage and employment levels, and evidence suggests unions are critical components of ensuring competitive market outcomes.

Costs and tradeoffs

Fewer jobs at unionized firms. This is one of the most consistent findings in the literature. Most studies find that jobs drop at newly organized companies, with employment falling between 5 percent and 10 percent. More broadly, 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, and these effects slightly increase the likelihood of a company closing.

Impact on industrial decline. Union power's role in the Rust Belt's decline is debated but notable: a study on "Labor Market Conflict and the Decline of the Rust Belt" finds that powerful labor unions and ensuing labor conflicts accounted for 55 percent of the decline in the Rust Belt's share of US manufacturing employment, though trade globalization also played a secondary role decades later.

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

Wage premium has narrowed. The historic wage gap has shrunk over time: labor unions have historically secured higher wages for unionized workers, but recent studies show that since the 1980s, the wage gap between unionized and non-unionized workers has narrowed, in large part because of global competition and technological changes.

Macroeconomic and societal effects

Beyond firm-level effects, some economists argue declining union power has broader consequences. By raising wages and reducing income inequality, unions spur economic growth, and research suggests the decline of unions over recent decades may have contributed to slower growth and "secular stagnation." Similarly, unionization has an inverse relationship with labor's share of income, and the decline in worker power has been associated with an increase in profits going to companies—a phenomenon that risks stymying long-run growth since workers' share of national income positively affects growth.

Bottom line

The evidence suggests unions genuinely raise wages and benefits for their members and often for non-union workers nearby, can improve workplace safety, and—contrary to older assumptions—don't necessarily reduce (and may even increase) productivity in many sectors. The real tradeoff is between these worker gains and effects on employment levels, corporate profits/investment, and competitiveness at unionized firms specifically. Whether unions are "good" on net depends heavily on which effects you weight most, the specific industry/context, and whether you're evaluating impacts on union members, the broader labor market, or aggregate economic growth. This remains a genuinely disputed empirical and political question rather than a settled one.