It's the question on everyone's lips in philanthropy: Who is the mysterious donor giving away millions of dollars to at least a dozen colleges across the country?
A circle of successful businesswomen? A publicity-shy (or playful) billionaire? Oprah?
What's so unusual is that not even the colleges themselves know the answer. But the parlor game is afoot, with only one real clue: So far, all the colleges are led by women.
Coincidence? Unlikely. With about 23 percent of U.S. college presidents women, the odds of a dozen randomly selected institutions all having female leaders are 1 in 50 million.
Melissa Berman, president and chief …