Gentrification, gun violence, and drug markets
研究发现绅士化会通过挤占本地毒品市场，导致周边街区枪支暴力增加；2011至2020年间费城约2400起枪击案（占8%）可归因于毒品街区绅士化的溢出效应。
I demonstrate the linkage between gentrification and gun violence. As the underlying mechanism, I focus on gentrification’s displacement effect on local drug markets. Using two-way fixed effects differences-in-differences estimators, I show the gentrification of one block increases violence across the surrounding neighborhood. I find that some 2400 (8%) of Philadelphia’s shootings between the years 2011 and 2020 can be attributed to spillover effects from the gentrification of drug blocks. This effect is nearly ten times stronger than that observed on blocks without high levels of drug crime. This study also contributes a new empirical measurement of gentrification drawn primarily from property sales, along with building, zoning, and alteration permit issuance and utilizes a novel nearest-neighbor network approach to identify spatial spillover effects .