Are labor unions good for workers and the economy?
The Heritage-cited firm-level findings of reduced R&D, sales, employment and profits conflict with The Conversation and NBER findings that unions do not reduce productivity and may modestly raise it.
Labor unions' effects on workers and the economy are genuinely contested among economists, with research pointing to both benefits and costs. Let me pull together some current data and analysis to give you a well-rounded picture.# Are Labor Unions Good for Workers and the Economy?
The answer is genuinely mixed and depends on what outcome you care about—economists find real benefits for workers alongside real costs for firms. Here's what the research shows:
Effects on Wages
Unions clearly raise pay for their members. While simple comparisons of the wages of union workers and nonunion workers find that union workers typically make about 20 percent more than nonunion workers, economists turn to other types of analysis to capture causal effects of unions on wages. 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.
There's also a "spillover" effect that benefits non-union workers too: each 1 percentage point increase in private-sector union membership rates translates to about a 0.3 percent increase in nonunion wages.
Effects on Productivity and Firms
This is one of the most contested areas. Research findings vary considerably by country and sector:
Effects on Profits (This One's Clear)
Unlike productivity, the profit effect is well-established: 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.
Effects on Inequality
Here there's genuine scholarly consensus, which is notable given how contested other union effects are: there is consensus that unions reduce economy-wide wage and income inequality, and one key study found de-unionization from 1973 to 2007 explains from 20% to 33% of rising wage inequality in the US.
Unions also appear to narrow demographic gaps. Empirical studies have confirmed that unions have closed race and gender gaps within firms—one study finds the wage gap between Black and white women was significantly reduced due to union measures, while another provides evidence of how collective bargaining has reduced gender wage gaps amongst teachers.
However, the magnitude matters a lot by sector. On the whole, unions reduce economy-wide wage inequality by less than 10 percent, though union impacts differ quite a lot between sectors—in the private sector, distributions of union and nonunion wages are very similar, with private sector unions reducing male inequality by just 1.5 percent in the US. By contrast, public-sector effects are much larger.
Still, most economists caution against overstating unions' role: most economists attribute the rising income equality to skill-biased technological change that has benefitted the most-skilled workers who tend to be nonunionized, while the demand for other, less-skilled workers stagnated leading to what is referred to as job polarization.
Effects on Investment and Long-Run Growth
Critics of strong unions argue that restrictive work rules and wage-setting above market rates can stifle flexibility, dull incentives, and slow down adaptation—higher wages that don't come with matching productivity gains can squeeze margins, limit reinvestment, and weaken firms' ability to compete and grow, and when profits shrink, so does investment.
On the other hand, pro-union researchers argue the opposite causal story: that weakening unions has disconnected pay from productivity growth. From 1948 to 1979, worker productivity per hour and worker compensation per hour more or less rose at roughly the same rate, but in the four decades after 1979—during which union density steadily fell—productivity per hour rose far faster than worker compensation, increasing 3.9 times as fast as worker pay.
The Bottom Line
There's no simple yes/no answer:
Essentially, unions redistribute economic gains toward workers and away from capital/profits, with real but contested effects on the overall size of the economic pie. Whether that trade-off is "good" depends heavily on how you weigh worker welfare and equality against firm flexibility, investment, and profit growth.
Citations (15)
- Labor Unions and the U.S. Economy
Source excerpt: “While simple comparisons of the wages of union workers and nonunion workers find that union workers typically make about 20 percent more than nonunion...”
statistic, article, points to yes. Claim: Union workers typically make about 20 percent more than nonunion workers in simple comparisons.
- Labor Unions and the U.S. Economy
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...”
statistic, article, points to yes. Claim: Causal analyses point to a union wage premium of around 10 to 15 percent, larger for longer-tenured workers.
- Labor Unions and the U.S. Economy
Source excerpt: “For example, one study finds that the wage gap between Black and white women was significantly reduced due to union measures.^[12] Another study provi...”
evidence, article, points to yes. Claim: Unions have closed race and gender gaps; the Black-white women wage gap was significantly reduced due to union measures.
- Unions do hurt profits, but not productivity, and they remain a bulwark against a widening wealth gap
Source excerpt: “We conclude that unions do not, overall, reduce productivity, though it varies according to specific circumstances. ”
evidence, article, points to yes. Claim: A comprehensive review found unions do not, overall, reduce productivity, though it varies by circumstances.
- Unions do hurt profits, but not productivity, and they remain a bulwark against a widening wealth gap
Source excerpt: “## National differences In Britain, for example, union influence has reduced company productivity. In the US, unionisation appears to be associated wi...”
evidence, article, neutral. Claim: Union productivity effects vary by country: negative in Britain, positive in some US sectors, none in manufacturing.
- NBER WORKING PAPER SERIES WHAT DO UNIONS DO?
Source excerpt: “Estimates of the union effect on productivity tend to be positive but modest, ruling out negative effects on average, but not conclusively establishi...”
evidence, official document, points to yes. Claim: NBER review found union productivity effects positive but modest, ruling out negative average effects.
- NBER WORKING PAPER SERIES WHAT DO UNIONS DO?
Source excerpt: “benefits that unions bring through lower turnover, improved productivity, more desirable distributions of compensation between wages and benefits, re...”
evidence, official document, points to yes. Claim: Unions bring benefits through lower turnover, improved productivity, better compensation distribution, and reduced pay dispersion.
- What Unions Do: How Labor Unions Affect Jobs and the Economy
Source excerpt: “Finds that a 50 percent increase in the ratio of union employees to total employees at a firm decreases R&D spending by 18 percent to 25 percent, decr...”
statistic, article, points to no. Claim: Firm-level data show unionization associated with decreased R&D, sales growth, employment growth, and profits.
- What Unions Do: How Labor Unions Affect Jobs and the Economy
Source excerpt: “Finds that workers who vote to join a union do win certification but that unions have essentially no effect on the firm or the workers. Wages do not r...”
evidence, article, neutral. Claim: Quasi-random variation research found unions have essentially no effect on firms or workers.
- How Unions Work for the Economy
Source excerpt: “(Studies have found, however, that unionization often hurts corporate profitability by forcing companies to share more of their revenues with their wo...”
evidence, article, points to no. Claim: Unionization often hurts corporate profitability by forcing firms to share more revenue with workers.
- Labor unions and health: A literature review of pathways and outcomes in the workplace - PMC
Source excerpt: “Finally, there is consensus that unions reduce economy-wide wage and income inequality (#28). Western and Rosenfeld (2011) find de-unionization from 1...”
evidence, article, points to yes. Claim: Consensus that unions reduce wage inequality; de-unionization explains 20-33% of rising US wage inequality.
- Can unions significantly reduce wage inequality? Depends on whether you’re in the public or private sector : Monthly Labor Review : U.S. Bureau of Labor Statistics
Source excerpt: “The authors note that, on the whole, unions reduce economy-wide wage inequality by less than 10 percent. However, union impacts on wage inequality in ...”
statistic, article, neutral. Claim: Unions reduce economy-wide wage inequality by less than 10 percent, with private-sector effects far smaller than public-sector.
- Do More Powerful Unions Generate Better Pro-Worker Outcomes?
Source excerpt: “Most economists attribute the rising income equality to skill-biased technological change that has benefitted the most-skilled workers who tend to be ...”
attribution, official document, points to no. Claim: Most economists attribute rising income inequality to skill-biased technological change and job polarization.
- Do More Powerful Unions Generate Better Pro-Worker Outcomes?
Source excerpt: “###### Cost at the Firm Level: Productivity, Profits, and Investment But more often, restrictive work rules and wage-setting above market rates stifle...”
evidence, official document, points to no. Claim: Restrictive work rules and above-market wages stifle flexibility, squeeze margins, and reduce investment.
- How Unions Work for the Economy
Source excerpt: “From 1948 to 1979, worker productivity per hour and worker compensation per hour more or less rose at the same rate, with both slightly more than doub...”
statistic, article, points to yes. Claim: Productivity and pay rose together 1948-1979, then productivity outpaced pay as union density fell.