Abstract
Present research on minor party performance consists largely of single-country studies or pooled studies including a raft of widely varying electoral systems. This study examines the topic from a cross-national perspective, but is limited to democratic polities with single-member districts and first-past-the-post rules. An original dataset is compiled including 217 elections drawn from 37 countries and several historical eras. Five political-institutional factors are explored: (1) federalism, (2) presidentialism, (3) electoral system institutionalization, (4) party organization, and (5) electoral volatility. The evidence suggests that major party hegemony is more complete in polities with unitary constitutions, parliamentary executives, long-enduring electoral systems, strong party organization and low electoral volatility.
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