Opposition fragmentation facilitates electoral accountability. Evidence from a survey experiment

Which is better for electoral accountability: a fragmented opposition that gives plenty of alternatives or an opposition with fewer stronger parties? While oppositions play a key role in democracies, the effect of opposition fragmentation on accountability remains unclear. On the one hand, fragmentation may enhance accountability by providing voters with ideologically close alternatives. On the other hand, increased fragmentation could make coordination over strong viable alternatives more difficult. In this study, I present an original survey experiment designed to test whether fragmentation of the opposition enhances accountability. Moreover, to assess the specific conditions under which fragmentation may enhance accountability, I distinguish between ideologues and pragmatic voters, and differentiate between ideological and valence issues. Results show that opposition fragmentation enhances accountability, particularly for ideologues. Lastly, I present a direct test of the mechanisms that demonstrates that fragmentation improves accountability because marginal gains in ideological proximity outweigh losses in viability.