As cities across the country and globe continue to generate new solutions to a wide variety of vexing problems, sharing information about what works and what doesn't has become more important than ever. Yet, outside of a few prominent policies, the vast majority of successful municipal experiments never reach a national audience or, for that…

For many decades communities have been troubled by the criminal activities of youth gangs. This report looks at almost 30 years of information collected on gang problems in nearly 4,000 communities. The number of localities reporting gang problems increased between the 1970s and the 1990s, representing a tenfold increase in the number of cities…