The 77-cents-on-the-dollar figure (more recently updated to approximately 84 cents) comes from the U.S. Census Bureau’s annual data comparing median earnings of all full-time, year-round male and female workers. S1 This is a real, regularly published statistic from a credible federal source.

However, the tweet made a critical addition that the data does not support: the phrase “for doing the exact same job.” The Census Bureau figure compares all men to all women working full-time, regardless of occupation, industry, hours beyond the full-time threshold, years of experience, or education level. It is an aggregate gap, not a controlled comparison.

When economists control for these variables, the gap narrows substantially. A comprehensive analysis by the CONSAD Research Corporation, commissioned by the U.S. Department of Labor, found that the adjusted gap falls to between 4.8 and 7.1 cents. S2 More recent research from Harvard economist Claudia Goldin, who won the 2023 Nobel Prize in Economics for her work on this exact topic, has shown that the remaining gap is driven primarily by how labor markets reward temporal flexibility — penalizing workers (disproportionately women) who need schedule flexibility for caregiving. S3

This does not mean pay discrimination doesn’t exist. The unexplained residual gap of roughly 5–8% may reflect discrimination, unmeasured variables, or both. But presenting the raw 77-cent figure as evidence of equal-work pay discrimination misrepresents what the statistic actually measures and obscures the structural economic factors that Goldin and others have identified as the primary drivers.