(CNN) — A lot can change in two decades. Or... not.
In 2022, US women on average earned about 82 cents for every dollar a man earned, according to a new Pew Research Center analysis of median hourly earnings of both full- and part-time workers.
That's a big leap from the 65 cents that women were earning in 1982. But it has barely moved from the 80 cents they were earning in 2002.
"Higher education, a shift to higher-paying occupations and more labor market experience have helped women narrow the gender pay gap since 1982," the Pew analysis noted. "But even as women have continued to outpace men in educational attainment, the pay gap has been stuck in a holding pattern since 2002, ranging from 80 to 85 cents to the dollar."
The average isn't the whole story
Before getting to potential reasons why the pay gap hasn't narrowed for two decades — let alone disappeared — it's worth noting that the top-line average doesn't tell the whole story of what's been going on for women in different cohorts.
Take age: Women between the ages of 25 and 34 are much closer to achieving pay parity with men than they are likely to be when they get older.
Since 2007, younger women have been earning about 90 cents on the dollar, according to Pew: "But even as pay parity might appear in reach for women at the start of their careers, the wage gap tends to increase as they age."
Having children is a factor, Pew found. For example, parenthood leads some women to put their careers on hold, or put in a shorter workweek. For employed fathers between the ages 35 and 44, having children at home is a time that often coincides with receiving higher pay even though the pay of employed mothers that same age is unaffected.
"In 2022, mothers ages 25 to 34 earned 85 percent as much as fathers that age, but women without children at home earned 97 percent as much as fathers. In contrast, employed women ages 35 to 44 — with or without children — both earned about 80 percent as much as fathers," the report said.
Or take race and ethnicity: Pew found that Black women last year earned just 70 percent as much as White men. Hispanic women earned 65 percent as much. For White women, the gap was less, at 83 percent. Asian women were closest to parity, at 93 percent.
"To some extent, the gender wage gap varies by race and ethnicity because of differences in education, experience, occupation and other factors that drive the gender wage gap for women overall," the Pew analysis noted.
"But researchers have uncovered new evidence of hiring discrimination against various racial and ethnic groups, along with discrimination against other groups, such as LGBTQ and disabled workers," the report continued. "Discrimination in hiring may feed into differences in earnings by shutting out workers from opportunities,"
Lastly, consider occupation: Women are still overrepresented in lower-paying occupations such as personal care and service jobs; and underrepresented in higher-paying ones, like managerial and STEM jobs.
Regardless, the gender pay gap is typically narrowest when you pick any single occupation and control for measurable factors between men and women like education, tenure and hours worked.
"But it never goes away," said Rakesh Kochhar, a Pew senior researcher.
Why the gap persists instead of disappearing
The persistence of a gap over the past 20 years, even when comparing apples to apples, suggests there are other factors at play.
These can include potential discrimination. When Pew asked Americans in October what factors they believed played a role in the gender wage gap, half indicated a major reason is that employers treat women differently. Women were much more likely than men (61 percent vs 37 percent) to cite this as a major reason.
Another factor that may help explain the stickiness of the pay gap is that the wage premium for those with college degrees has grown smaller. So while more employed women (48 percent) now have at least a bachelor's degree than men (41 percent), it is worth less.
Individual choices such as taking periods away from the workforce to care for children also continue to play a role. Those choices may be borne of cultural norms, societal issues such as a lack of affordable child care, or personal preference.
Narrowing the gender pay gap from here may be tough sledding.
"More sustained progress in closing the pay gap may depend on deeper changes in societal and cultural norms and in workplace flexibility that affect how men and women balance their careers and family lives," Pew researchers suggested.
And even then, progress may be slower than desired, since, as they noted, "even in countries that have taken the lead in implementing family-friendly policies, such as Denmark, parenthood continues to drive a significant wedge in the earnings of men and women."
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