Summary of “Two Lessons of the Urban Crime Decline”

The drop in violent crime has led better-off families to move into poorer city neighborhoods, thus reducing the concentration of poverty in urban America.
Though gentrification has become a problem in a few prominent places, in most cities there is no good evidence that poor families have been pushed out of their neighborhoods as violence has fallen.
Critics will note that cities, in their efforts to reduce crime, have relied heavily on controversial tactics like aggressive policing and an expanded prison system.
To understand how cities have changed since the 1990s, I gathered data with Mr. Torrats-Espinosa and the doctoral student Delaram Takyar on city demographic characteristics, public and private security forces, business establishments and public institutions.
To find out whether these types of organizations had an impact on crime rates, we looked for situations in which anti-violence nonprofits were formed not in response to a rise in violence but because new sources of funding became available to community groups and leaders.
These findings suggest a new model for combating urban violence.
While police departments remain crucial to keeping city streets safe, community organizations may have the greatest capacity to play a larger role in confronting violence.
Working directly with law enforcement and residents, these organizations are central to the next stage in the effort to make our cities even safer.

The orginal article.