서울시 강남구의 CCTV 설치가 범죄예방에 미치는 효과 : 첫 신문보도 시점을 중심으로

This study analyze the changes of incidence in five major crime categories between pre-intervention and post-intervention period, in Kang-Nam township where CCTVs for crime prevention have been first installed in Seoul city, using monthly local crime statistics. In this study, the end of Oct-2002 as a intervention point of time was selected, because the installation of CCTV was first publicized through mass media in that time. To analyze this data, this study use RES(relative effect size) and quasi-experimental design, which has two experimental group(one is Kang-Nam township, the other is four neighborhood townships) and one control group(all remained townships in Seoul city). The results on this data show that the publicity of CCTV installation has reduced robbery and theft crime not only in Kang-Nam township but also in 4 neighborhood townships, and that some diffusion of benefits has been happened. And this diffusion of benefits has been specially strongly happened in a short period after the intervention. But the expressive crimes such as murder or assault crime have been not reduced and this show that the incidence of murder or assault crime is not influenced by the change of physical environment. This results is consistent with many existing research findings.