Professor Christopher Pissarides of the London School of Economics smiles as he speaks to the media in London Monday, Oct. 11, 2010, following his joint award for the Nobel Prize in Economic Sciences 2010.  The Nobel is awarded jointly to Americans Peter Diamond and Dale Mortensen, and British Cypriot Christopher Pissarides,  as joint winners for developing theories that help explain how economic policies can affect unemployment.(AP Photo/Sang Tan)

Photo by: Sang Tan

Professor Christopher Pissarides of the London School of Economics smiles as he speaks to the media in London Monday, Oct. 11, 2010, following his joint award for the Nobel Prize in Economic Sciences 2010. The Nobel is awarded jointly to Americans Peter Diamond and Dale Mortensen, and British Cypriot Christopher Pissarides, as joint winners for developing theories that help explain how economic policies can affect unemployment.(AP Photo/Sang Tan)