New York Times economic columnist Paul Krugman may be elated, thinking that the blue-city riot-palooza will have major economic benefits. That’s because there is a long-held economic notion, mostly by followers of economist John Maynard Keynes, that physical damage to buildings and infrastructure—whether natural or man-made—can be a boon to the economy. Source: Blue Cities Give the 'Broken Windows' Economic Growth Theory a Try