No less than 313 economists, including a Nobel Laureate, signed a letter to Congress yesterday saying that letting the Bush tax cuts expire "would constitute a profound and damaging anti-stimulus that would harm our prospects for expansion in the near future. The letter was co-signed by economists Wayne Angell, a former governor with the Federal Reserve; Nobel Laureate Vernon Smith of Chapman University; Allan Meltzer of Carnegie Mellon University; Warren Coats, formerly with the International Monetary Fund; Clark Johnson with the Defense Dept., and economic professors from Duke University, Princeton University, Stanford University and the University of Chicago. The National...