For years, people with foot or ankle problems have been prescribed "rocker shoes, " in which the soles curve like the bottom of a rocking chair to transfer the workload away from joints and bones.

CNN: Shoes' toning claims draw experts' doubts

Application of the Laffer Curve is why the United States boomed in the 1980s and 1990s, why India is rocking now and why eastern Europe will outperform western Europe.

FORBES: Ten Laws Of The Modern World

Application of the Laffer Curve is why the U.S. boomed in the 1980s and 1990s, why India is rocking now and why eastern Europe will outperform western Europe.

FORBES: Ten Laws of the Modern World