Coalition government and the electoral consequences of legislative organization

Abstract Voters are increasingly turning away from governing parties in parliamentary elections, with junior parties in coalition governments often bearing the brunt of the electorate’s dissatisfaction. Can the design of legislative institutions help parties mitigate the electoral costs of governing? We suggest that in systems with strong legislative committees, junior coalition parties are better positioned to protect their party’s policy brand from being eroded, which in turn helps insulate them from the electoral costs of governing. Analyzing data on legislative committees and party-level electoral outcomes in 36 European and OECD countries from 1990 to 2019, we find that stronger parliamentary committee systems are associated with harsher electoral costs for the prime minister’s party but reduced electoral costs for junior coalition parties. Our findings suggest that the structure of legislative institutions in parliamentary systems can have significant electoral implications, including relatively positive outcomes for smaller governing parties.