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Schofield N, Miller G (2007) Elections and activist coalitions in the United States. Am J Polit Sci
51(3):518–531
Schofield N, Sened I (2006) Multiparty democracy: elections and legislative politics. Cambridge
University Press, Cambridge
Sigelman L, Buell EH Jr (2004) Avoidance or engagement? Issue convergence in U.S. presidential
campaigns, 1960–2000. Am J Polit Sci 48(4):650–661
Snyder J (1994) Safe seats, marginal seats, and party platforms: the logic of platform differentia-
tion. Econ Polit 6:201–214
Winer S, Kenny L, Grofman B (2008) Explaining variation in the degree of electoral competition
in a mature democracy: U.S. Senate elections, 1922–2004. Presented at the annual meeting of
the Public Choice Society, San Antonio, March
Wittman D (1983) Candidate motivation: a synthesis of alternatives. Am Polit Sci Rev 77:142–157