The U.S.'s Biggest Brain Magnets

College graduates are heading in droves to Raleigh, Austin and, surprisingly, New Orleans.For a decade now, U.S. city planners have obsessively pursued college graduates, adopting policies to make their cities more like dense hot spots such as New York, to which the "brains" allegedly flock. But in the past 10 years, "hip and cool" places like New York have suffered high levels of domestic