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Photo by: Linda A. Cicero

Alvin Roth, a Harvard University scholar who is a visiting professor at Stanford University, takes a phone call at his home in Menlo Park, Calif., on Monday, Oct. 15, 2012, after being awarded the Nobel economics prize. Mr. Roth, 60, and Lloyd Shapley, 89, two Americans, were awarded the Nobel for their studies on the matchmaking that takes place when doctors are coupled up with hospitals, students with schools and human organs with transplant recipients. The work of two has sparked a flourishing field of research and helped improve the performance of many markets, the Royal Swedish Academy of Sciences said. (AP Photo/Stanford News Service, Linda A. Cicero)

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