Richard M. Thaler: Much has been said about the high rate of home foreclosures, but the most interesting question may be this: Why is the mortgage default rate so low? After all, millions of American homeowners are "underwater," meaning that they owe more on their mortgages than their homes are worth. Some homeowners may keep paying because they think it's immoral to default. This view has been reinforced by government officials like former Treasury Secretary Henry M. Paulson Jr., who while in office said that anyone who walked away from a mortgage would be "simply a speculator and one who is not honoring his obligation." (The irony of a former investment banker denouncing speculation seems to have been lost on him.) But does this really come down to a question of morality?
