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How Much of the Incumbency Advantage is Due to Scare-Off?

Published online by Cambridge University Press:  04 February 2015

Abstract

This paper uses a regression discontinuity design to estimate the degree to which incumbents scare off challengers with previous officeholder experience. The estimates indicate a surprisingly small amount of scare-off, at least in cases where the previous election was nearly tied. As Lee and others have shown (and as we confirm for our samples) the estimated party incumbency advantage in these same cases is quite large—in fact, it is about as large as the average incumbency advantage for all races found using other approaches. Drawing from previous estimates of the electoral value of officeholder experience, we thus calculate that scare-off in these cases accounts for only about 5–7 percent of the party incumbency advantage. We show that these patterns are similar in elections for US House seats, statewide offices and US senate seats, and state legislative seats.

Type
Original Articles
Copyright
© The European Political Science Association 2015 

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Footnotes

*

Andrew B. Hall is a Ph.D. candidate in the Department of Government at Harvard University, as well as an affiliate of the Institute for Quantitative Social Sciences, 1737 Cambridge St CGIS-Knafel Building, Room 453 Cambridge, MA 02138 (hall@fas.harvard.edu, http://www.andrewbenjaminhall.com). James M. Snyder, Jr. is the Leroy B. Williams Professor of History and Political Science at Harvard University and NBER, 1737 Cambridge St CGIS-Knafel Building, Room 413, Cambridge, MA 02138 (jsnyder@gov.harvard.edu, http://scholar.harvard.edu/jsnyder/home).

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