RePEcRePEc (Research Papers in Economics) is a collaborative effort of hundreds of volunteers in 101 countries to enhance the dissemination of research in Economics and related sciences. The heart of the project is a decentralized bibliographic database of working papers, journal articles, books, books chapters and software components, all maintained by volunteers. The collected data are then used in various services that serve the collected metadata to users or enhance it. So far, over 2,000 archives from 101 countries have contributed about 2.8 million research pieces from 3,200 journals and 5,000 working paper series.