The pay disparity between men and women is lower among union members than among American workers as a whole but it still exists, according to a new analysis of data released Wednesday.

Culling figures from the Census Bureau and Labor Department, among other sources, researchers from the non-profit Institute for Women’s Policy Research (IWPR) found that women in labor unions “earn 88.7 cents on the dollar compared with their male counterparts, a considerably higher earnings ratio than the earnings ratio between all women and men in the United States.”

As of 2013 women overall earned roughly 78 cents on the dollar compared to men, according to an April report from the White House’s Council of Economic Advisors. The IWPR report found that unionized women make 30.9 percent more than their non-union counterparts on average, among full-time workers.

IWPR study director Ariane Hegewisch, one of the report’s authors, said unionized women derive other benefits as well.

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