Taylor Shelton (Kentucky): The Urban Geographical Imagination in the Age of Big Data. A new typology of global cities: The seven types of global cities driving the world economy. Megacities will gobble up the best farmland, leaving humans hungry. Why we should build our cities upward, not outward. From Vox, Bogota closes its roads every Sunday — now everyone wants to do it; how Barcelona is taking city streets back from cars; and economists are underestimating the costs of letting small Rust Belt cities shrink. How to build the better cities of tomorrow? It takes careful planning — and political science research.