We assemble a new global database on motor vehicle travel speed in over 1,200 large cities in 152 countries. We then estimate comparable city-level indices of travel speed and congestion. Most of the variation in urban travel speed is across countries, not within. National income per capita...

The way cars are possessed has not had the close attention it deserves. The primary way of gaining access to cars has been assumed to be via owning one. Possession has thus been taken for granted, preventing us from seeing it as possibly problematic. However, the link between car use and car...