It's highly debatable that $2 billion for a basketball team is the best use of money for Los Angeles, or California, or the broader world. In the game of utilitarianism, malaria nets beat alley-oops every day. But it might be the best use of money for Steve Ballmer. As psychologists and economists have written exhaustively in the last few years, happiness is hard to buy, but if you're going to try to do it, buy experiences. Owning an ascendent NBA team in a glamorous city that's ready to hail you as the fabulously un-racist savior of their most exciting professional franchise? That's some experience. For $2 billion out of Steve