Crime Prevention Through Private Actors: Evidence From a Policy Change at a Large UK Supermarket Chain
研究利用英国大型超市Tesco加强安保措施的政策变化，分析其对盗窃犯罪的影响，发现安保升级显著减少了店内盗窃，并考察了犯罪是否转移至其他超市或商店。
ABSTRACT This paper investigates the effectiveness of private actors in contributing to crime prevention. We leverage well‐publicised increases in security measures, including additional security guards and tagging of goods, by Tesco, a large UK supermarket chain. Utilising geocoded administrative crime data and address information of supermarkets in Greater London, we compare streets near a Tesco supermarket with two control areas in a differences‐in‐differences design. Results suggest that Tesco's security enhancements led to a significant decrease in shoplifting. We also investigate crime displacement to other major supermarkets and other shops.