Urban mobility and neighborhood isolation in America’s 50 largest cities

• https://www.pnas.org/content/115/30/7735
• Qi Wang, Nolan Edward Phillips, Mario Small, Robert Sampson

Segregation, Urban mobility, Invisible borders

This paper uses Twitter‘s geocoded tweet data to estimate the home address and trips of individuals.

Home identification: DBSCAN*

At the block group level, the poverty doesn’t make much difference in terms of how far they travel. People living in poorer neighborhoods are less exposed to middle-class or white neighborhoods.