The Effects of Civil Gang Injunctions on Reported Violent Crime: Evidence from Los Angeles County
研究了洛杉矶县四个警察辖区中民事帮派禁令对暴力犯罪的影响，通过对比未受禁令覆盖的社区，发现禁令实施后第一年暴力犯罪水平下降5%至10%。
Several cities have recently adopted civil injunctions as a means to reduce gang violence. To evaluate the effectiveness of such injunctions, I develop an extensive database of neighborhood‐level reported crime counts from four police jurisdictions within Los Angeles County. I construct two different comparison samples of neighborhoods not covered by injunctions to control for underlying trends that could cause one to overstate the injunctions' effects. The analysis indicates that, in the first year after the injunctions are imposed, they lead the level of violent crime to decrease by 5–10 percent.