June 18, 2015: A review of data collected over the web, regarding recidivism rates by country. The authors come to the conclusion that an overabundance of variables makes it difficult to compare apples-to-apples rates between countries. Such variables include the different categorization of crimes (is shoplifting a misdemeanor or felony?) and sentencing guidelines saturating or thinning the sample population with recidivists.

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0130390