piCities of Commercei develops a model of institutional change in European commerce based on urban rivalry. Cities continuously competed with each other by adapting commercial, legal, and financial institutions to the evolving needs of merchants. Oscar Gelderblom traces the successive rise of Bruges, Antwerp, and Amsterdam to commercial primacy between 1250 and 1650, showing how dominant cities feared being displaced by challengers while lesser cities sought to keep up by cultivating policies favorable to trade. He argues that it was this competitive urban network that promoted open-access institutions in the Low Countries, and emphasizes the central role played by the urban power holders--the magistrates--in fostering these inclusive institutional arrangements. Gelderblom describes how the city fathers resisted the predatory or reckless actions of their territorial rulers, and how their nonrestrictive approach to commercial life succeeded in attracting merchants from all over Europe.p