The main objective is to identify push and pull factors that will help understand how and why criminal groups, organizations or general organized crime patterns are present across a variety of settings (i.e. geographical locations, criminal markets and legitimate industries). Push factors refer to forces which drive criminal groups from a setting. Pull factors refer to forces which draw criminal groups to a setting. A distinction is also made between contexts in which offenders organize around available opportunities (the strategic context) and contexts in which opportunities induce greater organizational levels amongst offenders (the emergent context). The most general statement that can be formulated from the present exercise is that opportunities matter more than the group itself. What the authors demonstrate is that the problems concerning geographical locations, criminal markets and legitimate industries that are vulnerable to organized crime are persistent and stable over time. Groups that seize such opportunities, on the other hand, are transient and more than often short-lived. Aside from reviewing past research in search of such factors, the authors also apply the general understanding that emerges from our analysis to critically assess case studies that reflect popular images of organized crime threats in Canada during recent years. The concluding section identifies the key issues that must be addressed within this area. (Published Abstract)