Washington Representatives Study (Organized Interests in Washington Politics) - 1981, 1991, 2001, 2006, 2011

The Washington Representatives database includes information about thousands of organizations involved in Washington politics, their organizational characteristics including the kinds of interests they represent and the nature of their membership, if any, and the activities they undertake in the pursuit of policy influence. The database encompasses all organizations listed in the Washington Representatives directories (published by Columbia Books) for 1981, 1991, 2001, 2006, and 2011 as being active in national politics by virtue of either having an office in the D.C. area or hiring D.C.-area consultants or counsel to represent them. These organizations have been classified into 96 categories based, principally, on the kinds of interests represented.