The G20 is an evolving international institution. Aided by both advances in information technology and support from home governments, a number of knowledge actors and networks seek to influence global economic governance with policy analysis and advice. This article assesses the international G20 think tank network called Think20 and the policy advocacy of private research institutes (such the Lowy Institute in Australia and the Centre for International Governance and Innovation in Canada) which are in the orbit of the G20 policy community. Think20 assists the global economic governance processes of the G20 by developing ‘coordinative discourses’ for policy development and implementation.Points for practitionersIdeas matter but ideas that imply major policy reform and innovation need to be made to matter if they are to direct government action. Networks provide one mechanism to broadcast and disseminate ‘communicative discourses’ to many different publics – local as well as global – and the infrastructure...