Paul Krugman, looking back to today from March 2, 2008, analyzes the recent drop in U.S. stock prices and what it might mean for our economic future: The Big Meltdown, by Paul Krugman, Commentary, NY Times: The great market meltdown of 2007 began exactly a year ago, with a 9 percent fall in the Shanghai market, followed by a 416-point slide in the Dow. But as in the previous global financial cris