The Concentration of Legislative Effectiveness in the American States In this Center for Effective Lawmaking (CEL) working paper, Professor Todd Makse of Florida International University and Jacob Lollis of the University of Virginia examine how effective lawmaking is distributed among legislators within a chamber. While legislative effectiveness scores for individual lawmakers are often emphasized, this paper highlights the frequently overlooked importance of evaluating how effectiveness is spread across all members of a legislative body. Through analyzing legislative effectiveness data, the authors develop new measures to assess the concentration and dispersion…