Theresa Kuchler, Johannes Stroebel, 09 August 2019

The mixing of people and ideas in cities is at the heart of the ‘agglomeration externalities’ that drive the high productivity of cities. While public transit infrastructure is thought to help different people living in different parts of the same city to interact with one another, the lack of large-scale data has made it difficult to study. This column explores the link between public transit and social connectedness in New York City. It finds the first suggestive evidence that New York City’s public transit system plays an important role in enabling social ties to be formed and maintained across geographic distances.

Stephen Redding, 22 October 2018

What accounts for London's explosive growth in the 19th and early 20th centuries? Tim Phillips talks to Stephen Redding of Princeton University about new research that shows how important the railways have been, and continue to be, in creating the modern metropolis.

Stephan Heblich, Stephen Redding, Daniel Sturm, 13 October 2018

Over the last two centuries, transportation innovations have drastically changed urban landscapes. This column explores how the mid-19th century transport revolution shaped the urban agglomeration of London. The results show Greater London’s population would have been 30% lower in 1921 without the railway network. The findings and the quantitative urban models employed highlight the role of modern transport technologies in sustaining dense concentrations of economic activity.

Events

CEPR Policy Research