Nobel Laureate economist Paul Krugman has recently argued that the most effective way to achieve long-term economic growth throughout the world is by having national governments borrow and spend lots of money creating and improving roads, trains, bridges, high-speed Internet, wind and solar power plants, and other infrastructure projects. Adolf Scheissekopf has argued that Krugman ’ s conclusion cannot possibly be true, since Krugman is a Jew. Scheissekopf ’ s argument is a(n)