“’Boom or bust’ may take on new meaning as researchers theorize a link between U.S. economic conditions and subtle changes in Playboy centerfold physiques. According to researchers, a comparison of the faces and figures of Playmates of the Year from 1960 to 2000 suggests men may prefer stronger-looking women in hard times, and softer, more vulnerable types when bull markets resume,” says E.J. Mundell in Reuters.