1 Legislative Effectiveness and Legislative Careers Gerard Padró i Miquel Department of Economics James M. Snyder, Jr. Departments of Political Science and Economics Massachusetts Institute of Technology July, 2004 1The authors thank seminar participants at Stanford University and The University of Cal- ifornia at Berkeley, the editor, and three anonymous referees for their helpful comments. James Snyder thanks the National Science Foundation for generous financial support provided under SES0079035. Gerard Padró thanks the Fundación Ramón Areces for its generous financial support. Correspondence should be directed to James Snyder - email:
[email protected]. Mailing address: Department of Political Science, MIT, Building E53-457, Cambridge, MA 02139. 1 Abstract We study an under-utilized source of data on legislative effectiveness, and exploit its panel structure to uncover several interesting patterns. We find that effectiveness rises sharply with tenure, at least for the first few terms, even after controlling for legislators’ institutional positions, party affiliation, and other factors. Effectiveness never declines with tenure, even out to nine terms. The increase in effectiveness is not simply due to electoral attrition and selective retirement, but appears to be due to learning-by-doing. We also find evidence that a significant amount of “positive sorting” occurs in the legislature, with highly talented legislators moving more quickly into positions of responsibility and power. Finally, effectiveness has a positive impact on incumbents’ electoral success, and on the probability of moving to higher office. These findings have important implications for arguments about term limits, the incumbency advantage, and seniority rule. 2 1. Introduction Good laws do not make themselves.