What if Lehman Brothers had been Lehman Sisters?

This is the title of a Harvard Business Review article that I read this afternoon. The author, Rosabeth Moss Kanter, cites data presented at the World Economic Forum/Harvard Kennedy school implies that women are “more trustworthy, risk averse, and altruistic, at least in the sense of negotiating more effectively for other people than for themselves.”

How might the economy be different if women were better represented at executive levels of financial institutions? What keeps women from achieving in finance?