Engel, Christoph Max Planck Institute for Research on Collective Goods, Max Planck Society;
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2012381 (Any fulltext)
http://www.coll.mpg.de/pdf_dat/2012_04online.pdf (Preprint)
Engel, C. (2012). Low Self-Control As a Source of Crime. A Meta-Study.