1. Navigating non-positivity in neighbourhood studies: an analysis of collective efficacy and violence. Issue 2 (22nd August 2012) Authors: Ahern, Jennifer; Cerdá, Magdalena; Lippman, Sheri A; Tardiff, Kenneth J; Vlahov, David; Galea, Sandro Journal: Journal of epidemiology and community health Issue: Volume 67:Issue 2(2013) Page Start: 159 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗