Political polarization and corruption: A theoretical and empirical review

Notwithstanding the considerable scholarly and public attention that political polarization and corruption have attracted in recent years and the important mechanisms through which the former may influence the latter, research in this area remains limited and inconclusive. This article offers a comprehensive theoretical and empirical synthesis of the current state of research in this domain. It finds that a large fraction of the apparent contradictions can be attributed to the conceptual inconsistencies and ambiguity surrounding political polarization. The types of polarization that have an inherently hostile and uncivil element (usually referred to as affective or pernicious polarization) undermine democratic accountability, which leads to more corruption. The role of ideological polarization among parties and the general population is more complex: it may boost accountability and decrease corruption but can also contribute to the aforementioned harmful forms of polarization and enhance the role of partisan bias in public opinion formation, thereby increasing corruption. The overall effect of ideological polarization on corruption may depend on the nature and the degree of the former, as well as on mitigating contextual factors. The two may create a vicious circle as corruption also increases political polarization via various channels.