PracticeSignals and CommunityOne scored question.The Campbell systematic review on neighborhood watch reported a 16–26% relative crime reduction. What did the same review say about its own evidence base?That the mechanism was well establishedThat the effect was consistent across all studiesThat it had publication bias and unequal comparison areasThat the effect was larger in the UK than in North AmericaKeys 1 to 4Tested in Neighbors, and What People Actually Do
