Partisanship and Electoral Accountability: Evidence from the UK Expenses Scandal

Abstract

Why do voters support corrupt politicians? One reason is that voters care about both corruption and partisan control of government; the more voters care about which party wins, the less they can deter individual wrongdoing. I highlight this tradeoff in the 2009 UK expenses scandal, showing that electoral accountability was less effective in constituencies where the partisan stakes of the local contest were higher: not only did corrupt MPs in these constituencies suffer smaller punishments, but these MPs were also more likely to be implicated in the scandal in the first place. The findings point to an under-appreciated consequence of partisanship (and underlying causes such as strong party systems and polarization at the elite or mass level) for the electoral control of politicians.