Hitting the Sweet Spot? The Electoral Consequences of Supporting Minority Governments

Does supporting a minority cabinet harm a party’s electoral prospects? While minority governments have become more common in recent years, the electoral implications for parties supporting such cabinets remain unclear. Previous research suggests that support parties enjoy a favorable position, exerting policy influence while avoiding electoral losses associated with joining the government. However, we argue that this is only true for support parties without written agreements, as their support is less visible to voters. To test our argument, we compiled a novel dataset on the electoral performance of 563 parties in 304 elections across 31 countries since 1980. We estimate the effect of being a support party on subsequent electoral performance. Our findings indicate that parties which declare support perform better electorally than junior partners, while contract support parties do not. These insights shed light on the relationship between minority governments and electoral competition amidst growing party system fragmentation.