RT Article T1 How effective are our 'better angels'?: assessing country-level declines in homicide since 1950 JF European journal of criminology VO 12 IS 4 SP 482 OP 504 A1 LaFree, Gary 1951- A2 Curtis, Karise A2 McDowall, David 1949- LA English YR 2015 UL https://krimdok.uni-tuebingen.de/Record/163427282X K1 Conflict theory K1 Fixed effects regression K1 Modernization theory