Working papers are preliminary research papers that are posted online to encourage discussion and comment. Economists publish working papers as a timely and informal way of communicating their research findings. When using working papers, keep in mind:
A think tank is "an organization, institute, corporation, or group that conducts research and engages in advocacy in public policy." (Sourcewatch.org)
When using information from a think tank:
Think Tank Search is a custom Google search of more than 450 think tank websites selected by The Harvard Kennedy School of Government Library. See their website for information on the inclusion policy and links to U.S. and international think tank websites.