This paper identifies a range of governance mechanisms to support the efficient and equitable provision of public services and improve policy coordination in metropolitan areas. It provides examples from cities in the Global North and Global South, and takes a closer look at metropolitan governance in Brazil, where the constitution makes it challenging to create formal metropolitan structures. The paper suggests that the choice of metropolitan governance structure depends upon how one weighs conflicting considerations—prioritizing efficiency, access, and accountability points to smaller local government units whereas economies of scale, externalities, and equity suggest larger governments. The review of metropolitan governance models does not point to one model that could work everywhere because national and local context matter. Nevertheless, the paper suggests that countries should develop more effective systems of governance for metropolitan areas if they want to improve service delivery, cost sharing, and decision-making. A regional structure that encompasses the entire economic region would ensure that services are delivered in a coordinated fashion across municipal boundaries and improve the process as a whole by reaping the benefits of economies of scale and internalizing externalities.

The Ramphal Institute conference on megacities and air pollution, on 27-28 September 2018, was a pioneering exercise to bring together experts from Dhaka, New Delhi, Gauteng, Lagosand London to exchange ideas on how to reduce toxicity in the air we breathe. The RamphalInstitute, with its vocation for the Commonwealth, organised an interactive event with the invaluable sponsorship support of Elsevier, the global data and analytics company specialising in science  and health. The Institute has been working on megacity issues with the Bangladesh Enterprise Institute, Dhaka, theNational Institute of Urban Affairs, New Delhi, the Gauteng City Region Observatory, Johannesburg,and the Socio-Economic Rights and Accountability Project, Lagos. Our aim in this conference wasto focus on improving air quality, looking not only at the science, but at policy and public relations aspects as they affect what city leaders can do.

If it really matters how a metropolitan region is governed, should it not be obvious on the ground? To take just three NewWorld examples of metropolitan-scale city councils, Calgary, Houston and Brisbane should have a different ‘look and feel’ to that of their fragmented equivalents, not to mention greater efficiency and equity stemming from their ability to manage growth across all or most of the urban region.

Robin Hambleton and Jill Simone Gross have assembled a collection of papers which powerfully supports their argument that “those concerned with the future of cities, whether as academics or practitioners, should devote more time to instrumental learning from abroad.” Contributions range widely from the influence of globalisation and urbanisation, to the importance of understanding the unique impact of our own context; from innovation in the leading ‘world cities’ of the developed world, to the seemingly intractable problems of cities in the developing world; from celebrating the importance of a shift from government to governance, to contributions highlighting the potential of governance to undermine local democracy; and from the role of leadership to the dangers of persistent managerialism.

This book is about the role that ideas, institutions, and actors play in structuring how we govern cities and, more specifically, what projects or paths are taken. Global changes require that we rethink governance and urban policy, and that we do so through the dual lens of theory and practice.