"Profit margins are probably the most mean-reverting series in finance, and if profit margins do not mean-revert, then something has gone badly wrong with capitalism. If high profits do not attract competition, there is something wrong with the system and it is not functioning properly."

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People assume Wall Street is a certain culture and tech is a certain culture. But if you look at the (gender) numbers at the top of (those) industries, they don't vary very much. I think in finance, women hold 19 percent of the top jobs, and women are 21 percent of the leaders in nonprofits.

— Sheryl Sandberg