Why was Runoff Superior? Theory and Cross-National Evidence
This chapter describes plurality advocates’ arguments against runoff and reports the cross-national evidence for and against them. Plurality advocates’ concerns about outsiders and voter fatigue were not borne out. However, runoff advocates’ concerns about legitimacy deficits and ideological extremes under plurality were warranted. The chapter also confirms that runoff lowered barriers to entry—especially important in the Latin American context of inaccurate pre-election opinion polls. Although the entry of new parties was a factor in the larger number of parties and paucity of legislative majorities under runoff, it was also helpful due to the authoritarian proclivities of many long-standing Latin American parties and the need, after the Cold War, to incorporate the left into the political arena.