``We are clearly on the edge,'' Greenspan told a group of energy-industry executives yesterday at the Cambridge Energy Research Associates' 27th annual CERAWeek conference in Houston. He reiterated comments from last month that the odds of an economic contraction are ``50 percent or better.''
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``Home prices will continue to weaken,'' the 81-year-old former Fed chief said. ``When a bubble breaks, you go to primordial fear.''