On Wednesday July 2, 2014, The Washington Post ran an article about the pay gap between men and women working in the White House. According to The Post, “[t]he average male White House employee currently earns about $88,600, while the average female White House employee earns about $78,400, according to White House data released Tuesday [July 1, 2014]. That is a gap of 13 percent.” Or, said differently, women earn $0.87, on average, for every dollar earned by men working at the White House.

The White House explained the pay gap (without doing any regression analysis) by having a female spokesperson respond that “even if the aggregate statistics show a gap, men and women in the same roles at the White House are paid similar amounts. ‘At the White House, we have equal pay for equal work,’ said White House spokeswoman Jessica Santillo. ‘Men and women in equivalent roles earn equivalent salaries, and over half of our departments are run by women.’”

When men and women “in the same roles” are compared, most companies and institutions can explai