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...

Until about two hundred years ago, almost everyone faced the prospect of a life that was poor, nasty, brutish, and short, with few if any prospects for betterment. For example, in today s money, annual average per-capita income during the first millennium was constant at about $500. And most of the next century saw little in the way of expanded opportunities. Indeed, until the early nineteenth century, annual average per-capita income was only a couple of hundred dollars higher, and the average per-capita growth rate barely increased above zero.

Why have societies so...