This is an interesting working paper by a team of researchers at NYU’s Marron Institute of Urban Management. The paper examines the relationship between urban density and organized violence, first in Colombia and then within a sample of 200 global cities.

The finding is that organized violence actually increases the population density of the surrounding areas within a city because it creates a kind of “invisible wall” – effectively a no-go zone.

This makes perfect intuitive sense, but it’s not something I ever considered. Geography and other natural constraints typically drive density. Think about the island of Manhattan. But so too can invisible walls.

For the full working paper, click here.

Photo by Joel Duncan on

This is an interesting working paper by a team of researchers at NYU’s Marron Institute of Urban Management. The paper examines the relationship between urban density and organized violence, first in Colombia and then within a sample of 200 global cities.

The finding is that organized violence actually increases the population density of the surrounding areas within a city because it creates a kind of “invisible wall” – effectively a no-go zone.

This makes perfect intuitive sense, but it’s not something I ever considered. Geography and other natural constraints typically drive density. Think about the island of Manhattan. But so too can invisible walls.

For the full working paper, click here.

Photo by Joel Duncan on