A new report by the McKinsey Global Institute, “The Power of Parity: Advancing Women’s Equality in the United States,” says that gender parity in the United States could add up to $4.3 trillion a year to the Gross Domestic Product by 2025.

"We can't know what we don't know. We can't deliver on the promise of equal pay unless we have the best, most comprehensive information about what people earn," Secretary of Labor Thomas E. Perez said Friday.

As Congress enters recess, House members are reminding their Senate colleagues to get serious about pay equity, in the wake of last year’s disastrous Ledbetter v. Goodyear decision by the Supreme Court. One is 15-year House veteran Lucille Roybal-Allard, who as the first Mexican-American woman to serve in Congress knows a thing or two about societal barriers: The Paycheck Fairness…