Here, then, is a revised version of Marshall's rules: (1) Figure out what you think about an issue, working back and forth among verbal intuition, ev… - Paul Krugman

As is often the case with major disputes in economics, the argument over fiscal policy went on for years, with some critics of fiscal policy still defending their position when this book went to press. It seems fair, however, to say that among economists a more or less Keynesian view of the effects of fiscal policy came to prevail. Careful statistical studies at the International Monetary Fund and else where showed that austerity policies have historically been followed by contraction, not expansion. Recent experience, in which countries like Spain and Greece that were forced into severe austerity also experienced severe slumps, seemed to confirm that observation. Furthermore, it was clear that those who had predicted a sharp rise in U.S. interest rates due to budget deficits, leading to conventional crowding out, had been wrong: U.S. long-term interest rates remained near record lows even during the years from 2009 to 2012, when the government ran very large deficits.

If the question is when markets will recover, a first-pass answer is never.

The history of of the study of the location of economic activity is more like the story of geological thought about the shapes and location of continents and mountain ranges. The location of production is an obvious feature of the economic world. Indeed, I began to get interested in economics as a schoolchild by looking at those old-fashioned maps of countries that used picturesque symbols to represent economic activity: sheaves of wheat to represent agriculture, little miners' carts to represent resource extraction, little factories to represent industry, and so on. And yet there is almost no spatial analysis in mainstream economics.