Women leaders are leaving their companies at the highest rate ever, and the gap between women and men in senior roles quitting their jobs is the largest it's ever been, according to new data from LeanIn.org and McKinsey & Company, which started tracking these numbers in 2015. Women are still struggling to climb the corporate ladderMore than half (58%) of women under 30 say career advancement has become more important to them over the past two years, compared to 31% of women leaders. What's more, women leaders are twice as likely as men leaders to be mistaken for someone more junior — and 37% of women leaders have had a co-worker receive credit for their idea, compared to 27% of men leaders. "It's a disastrous situation … you're not promoting enough women into the leadership ranks, and now you have more women leaving leadership roles," Thomas says. "In a world where women remain dramatically underrepresented in senior leadership, those two problems together create a pretty awful one-two punch for companies trying to hold on to women leaders."

---