Experience, institutions, and candidate emergence: The political career returns to state legislative service ∗ Joshua McCrain Stephen D. O'Connell This Version: November 16, 2020. Abstract More than half of the current members of the U.S. Congress served in their state legisla- ture prior to holding federal office. We quantify the relationship between state legislative service and career progression to Congress. Using close elections for exogenous assign- ment of political experience across otherwise similar candidates, we show that serving in the state legislature more than doubles an individual's probability of eventually con- testing a Congressional seat relative to a similar candidate who lost in a comparable election; it also doubles the individual politician's probability of eventually winning a Congressional seat. State legislatures thus create national politicians out of otherwise marginal political entrants. We then show that the effect of state legislative service on career progression is larger in more professionalized legislatures, highlighting the role of institutions in facilitating political career progression. Our results hold important im- plications for representation and accountability, and confirm that prevailing institutions can affect political selection via career progression. Keywords: political selection, candidate emergence, experience, political careers, Congress, U.S. politics. ∗Acknowledgements and contact information: We thank Hans Hassell, Zoe Nemerever, James Reeves, Joel Sievert, and Olga Stoddard for helpful comments. We are grateful to Ryan Brown, Hani Mansour, James Reeves, James Strickland and Jason Windett for sharing data. McCrain: Michigan State University Institute for Public Policy and Social Research. E-mail:
[email protected]. O'Connell: Emory University De- partment of Economics and IZA Institute of Labor Economics.