“Homeowners should be walking away in droves. But they aren’t. And it’s not because the financial costs of foreclosure outweigh the benefits. One can have a good credit rating again–meaning above 660–within two years after a foreclosure.” That’s the conclusion reached by a law professor who’s written a paper about strategic default, which is when you elect to walk away from an underwater mortgage because you stand to lose more money trying to keep it than if you cut your losses immediately. The problem is, lots of people think it’s the wrong thing to do, because individuals are supposed to play by different rules than the companies they do business with.