http://www.federalreserve.gov/boarddocs/speeches/2004/20041119/default.htm#fn2

"Nonetheless, despite extensive efforts on the part of analysts, to my knowledge, no model projecting directional movements in exchange rates is significantly superior to tossing a coin. I am aware that, of the thousands who try, some are quite successful. So are winners of coin-tossing contests."

Economists have this deadpan inadvertent, or sometimes purposeful, knack of saying stuff thatīs funny.