Among private sector workers, the decline is wage differences is even more stark. The gap between union and nonunion wages fell by two-thirds between 2007 and 2023, from 24.9 percent to 8.4 percent.
Historically, union wages have been significantly higher than nonunion wages. That’s because unions function like cartels to drive up wages for the workers they represent, which restricts the number of workers companies can employ and creates upward pressure on company prices.
Selection bias, such a union’s seniority-based pay scales and “last-hired, first-fired” layoff rules, can also elevate union wages above nonunion wages.
Until recently, the wage differential between union and nonunion workers in the United States was around 25 percent. That gap has plummeted in recent years as nonunion workers’ wages have grown faster than those of union workers. Between 2019 and 2023, nonunion wages rose 22.2 percent (before inflation) while union wages rose only 15.8 percent.
Consequently, the difference between union and nonunion wages fell from 21.3 percent in 2019 to 15.0 percent last year.
Unions’ wage advantage has declined across nearly every industry over the past four years, with the exception of the education and leisure & hospitality sectors. In some industries, the decline in union wage advantages has been especially steep.
In health care and social services, the union wage advantage was cut in half from 2019 to 2023, from 18.2 percent to 9.2 percent.
In the wholesale and retail trade, the difference between union and nonunion wages disappeared, from 4.4 percent to 0 percent.
And in manufacturing, unions’ wage advantage reversed, from 3.1 percent in 2019 to -4.0 percent in 2023, with nonunion manufacturing wages now exceeding union pay.
So, why have unionization rates and union wages been falling despite significant union-organizing efforts at places such as Starbucks, Amazon, and Trader Joe’s, as well as President Joe Biden’s “whole of government” approach toward increasing unionization?
Meanwhile, by engaging directly with their employers, workers have been able to achieve stronger wage gains (albeit entirely erased by inflation), increased workplace flexibility, expanded benefits (such as paid family leave) and a multitude of educational opportunities.
The labor market will not stay as strong as it has been in recent years, and a slew of labor market regulations are poised to make it harder for workers to achieve rising wages and flexible work that meets their needs.
That’s why it’s important that policymakers take action to protect workers’ rights and maximize their opportunities.