This paper examines the impact of Uber, the world's largest ride-hailing firm, on congestion. Drawing on data from large urban areas in Europe and the United States for the period 2008 through 2016, it finds a negative impact of Uber on congestion in Europe and a positive impact in the United...

The great weight that the car has as a means of mobility in large cities generates significant negative externalities both in terms of pollution and congestion. The goal of this paper is to examine the effectiveness of low emission zones (LEZ), which are being implemented extensively in Europe....