%0 Journal Article
%T ¡®Lowering the threshold of effective deterrence¡¯¡ªTesting the effect of private security agents in public spaces on crime: A randomized controlled trial in a mass transit system
%A Alex Sutherland
%A Barak Ariel
%A Matthew Bland
%J Archive of "PLoS ONE".
%D 2017
%R 10.1371/journal.pone.0187392
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5718484/