Conventional wisdom warns that unaccountable political and business agents can enrich a few at the expense of many. But logically extending this wisdom implies that associated principals - voters, consumers, shareholders - will favor themselves over the greater good when 'rules of the game' instead create too much accountability. Democratic Governance and Economic Performance rigorously develops this hypothesis, and finds statistical evidence and case study illustrations that democratic institutions at various governance levels (e.g., federal, state, corporation) have facilitated...