Revisiting Adjusted ADA Scores for the U.S. Congress, 1947-2007

Abstract

This paper replicates and extends Groseclose, Levitt, and Snyder, “Comparing Interest Group Scores Across Time and Chambers: Adjusted ADA Scores for the U.S. Congress,” which appeared in the American Political Science Review (1999/93:33-50). We replicate the most recent unpublished extension by Dr. Groseclose and research assistants for years 1947-1999, and then we extend the analysis to include years 2000 through 2007. We make available inflation-adjusted ADA scores from 1947 through 2007, allowing scholars to incorporate the most recent interest group scores into their analyses.