On this week’s Consuelo Mack WealthTrack: one of the few economists to foresee the global economic slowdown. Gluskin Sheff’s David Rosenberg saw signs of trouble as chief economist at Merrill Lynch. Now back in his native Canada at Gluskin Sheff he continues to warn about a prolonged slump with high unemployment in the developed world. He tells Consuelo what it means for investors and where to find growth despite a stagnant U.S. and Europe.