RT Article T1 Estimating the causal effect of gun prevalence on homicide rates: A local average treatment effect approach JF Journal of quantitative criminology VO 29 IS 4 SP 477 OP 541 A1 Kovandzic, Tomislav A2 Kleck, Gary 1951- A2 Schaffer, Mark E. 1959- LA English YR 2013 UL https://krimdok.uni-tuebingen.de/Record/1912540320 DO 10.1007/s10940-012-9185-7