Urban areas are now home to more than half the population of OECD countries. Megacities like Tokyo with more than 35 million people and Mexico with about 18.5 million, and large agglomerations such as Montreal, Helsinki, Madrid and Stockholm are often called "engines of national growth." They...

With over 70% of Europeans living in urban areas, cities and metropolitan areas are the motors of economic growth and home to most jobs. They play a key role as centres of innovation and the knowledge economy. At the same time, urban areas are the frontline in the battle for social cohesion and...