IDEAS (Internet Documents in Economics Access Service)Like EconPapers , this service takes bibliographical information from RePEc, which in turn has "inputs" from many different sources. At last count, RePEc contained more than 1,000,000 items, of which many are working papers, but there are also many articles and other items. IDEAS makes this material easily searchable. Data in IDEAS is intertwined with that in RePEc Author Service (RAS) . Thus, when searching for a paper in IDEAS, the author information comes from RAS.