Warren Buffett, the billionaire investor, urged corporate America in an essay published online Thursday to help develop women's workplace potential, arguing women are the key to America's economic prosperity.
The essay, written for the May 20 issue of Fortune Magazine, made the economic -- and ethical -- case for expanding opportunities for women.
It comes just a few months after Sheryl Sandberg, Facebook's chief operating officer, published her book "Lean In," which pushes women to be more assertive in their careers and calls for more mentorship of female employees.
Sandberg's memoir has sparked a national conversation on women's workplace advancement.
In his essay, Buffett, chief executive of Berkshire Hathaway, recalls his own friendship with the late Katherine Graham, who was chief executive of the Washington Post Co.