RT Article T1 Block Randomized Trials at Places: Rethinking the Limitations of Small N Experiments JF Journal of quantitative criminology VO 30 IS 1 SP 97 OP 112 A1 Weisburd, David 1954- A2 Gill, Charlotte LA English YR 2014 UL https://krimdok.uni-tuebingen.de/Record/1638154937 K1 Policing K1 Hot-Spots-Ansatz K1 Evaluationsforschung K1 Medodenfragen