Abstract
Governing a city is arguably one of the most complex management tasks facing organizational leaders. Based on an analysis of Vienna, London, and Chicago, this article demonstrates that city leaders treat cities as ecosystems, structured and governed either as "extended enterprises" where inputs from specialized organizations are coordinated and integrated into the final service or as "platform markets" where direct interactions between third-party service providers and citizens are facilitated by the city leaders. If cities are viewed as the "ecosystem of ecosystems," then successful city governance requires an orchestration approach where leaders choose the appropriate structure and manage the ecosystem dynamically in a constantly changing environment.