“…Interventions which directly target high-risk groups such as repeat offenders are relatively easy to evaluate through experimental study design (Rosenberg et al 2006). Hence, the effects of proximal, as opposed to distal, interventions may be more prominently represented in the literature because they are relatively easy to demonstrate (Limbos et al 2007;Matzopoulos et al 2010). Upstream interventions, instead, often address less clear-cut risk factors such as education, employment and living conditions, and are therefore more difficult to assess.…”