In 1968, Sveriges Riksbank (Sweden's central bank) established the Prize in Economic Sciences in Memory of Alfred Nobel, founder of the Nobel Prize. The Prize in Economic Sciences is awarded by the Royal Swedish Academy of Sciences, Stockholm, according to the same principles as for the Nobel Prizes that have been awarded since 1901. This volume is a collection of the Nobel lectures delivered by the prizewinners, together with their biographies and the presentation speeches, for the period 2006-2010.