By Katty Kay and Claire Shipman -- Fixing the Economy Is Women's Work

There's a sound business reason why Norway now mandates that corporate boards be 40 percent female. Why Iceland, after its embarrassing financial mess, put major banks and its government in female hands. And why Hermes, the only French company to outperform expectations during the recession, also has, you guessed it, a management structure dominated by women.

Americans aren't so enamored of social engineering, of course, so how do we get to that profitable mix? To us, the answer is clear. Professional women have been leaving the workplace in droves, and we need to stop the brain drain. Recent studies show that almost a third of professional women opt out at some point in their careers and, strikingly, that MBAs are more likely than lawyers or doctors to choose to stay home with their children.

Beyond a certain point, many women find that the costs to family of a high-octane career are just too great. We need to recognize that the glass ceiling is in part a self-imposed, defensive perimeter. But we can't afford to have women take themselves out of the running for top slots. And the only way to prevent that is changing the workplace to allow us the freedom to fit in our personal lives.

Luckily, that freedom makes economic sense, too. That's why companies such as Wal-Mart, Capital One, Best Buy, Sun Microsystems and Sara Lee, to name just a few, say they have glimpsed the future of work and have decided it's an extremely manageable place. They've discovered that allowing people to work the way they want -- from home; at night; from the sidelines of the soccer field -- actually increases productivity. Best Buy found that changing the work rules boosted productivity by an average of 40 percent.

And though progress is slow, women are negotiating nontraditional paths to senior management. Witness Sara Lee's chief executive, Brenda Barnes. As a PepsiCo executive vice president, she left corporate America for seven years to raise her children. Her return is a singular achievement, but it suggests a future in which careers can move in waves, not straight up, or straight off of, a ladder.

Corporate America, take the first step toward economic recovery. Open your minds and offices to new ways of working and succeeding. Not because you are nice guys -- but because it will help the economy and your bottom line.

womenomics@gmail.com

Katty Kay is a Washington anchor and reporter for "BBC World News America." Claire Shipman is the senior national correspondent for ABC's "Good Morning America." They are the authors of "Womenomics."