SAN DIEGO (MarketWatch) -- You will have to pardon Paul Kasriel, chief of economic research at Northern Trust in Chicago, if he hasn't been the life of the party over the past seven or eight years. The 60-year-old economist, tapped in 2006 as the top economic forecaster by Arizona State University's W.P. Carey School of Business, has spent a good deal of that time trying to warn anybody who would listen about such things as excessive household debt while taking a jab or two (or three) at then-Federal Reserve Chairman Alan Greenspan. "Illusory" is how, in October 2004, Kasriel described...