“…Researchers have long recognized that the structure of illicit drug distribution strategies and the resulting consumer markets shape drug use (Curtis & Wendel, 2000; Ritter, 2006), use-associated health risks from both illicit and newly legal markets (Amini, Aleagha, & Akhgari, 2015; Hall, 2017; Hall & Lynskey, 2016; Livingston, Barnett, Delcher, & Wagenaar, 2017; Mars et al, 2015), and a range of economic and criminal justice concerns (Curtis & Wendel, 2007). Top–down distribution organizations (Spunt, 2003; Wendel & Curtis, 2000), urban gangs (Fagan, 1989), user-dealer combinations (Davenport & Caulkins, 2016), and legal-market conversion structures (Jonas, Young, Oser, Leukefeld, & Havens, 2012) are examples of market structures that have emerged around drugs such as heroin, crack cocaine, marijuana, and prescription opiates (Natarajan, Zanella, & Yu, 2015).…”