“…While some researchers found evidence that nonmandated PDMPs reduce fatal nonoxycodone-related overdoses and poisonings (Mallatt, 2017;Patrick et al, 2016;Simoni-Wastila and Qian, 2012), most of them found evidence of small or null effects on drug abuse (Simoni-Wastila and Qian, 2012; Meara et al, 2016). However, recent studies focusing on the effects of mandated PDMPs found significant effects on opioid quantity and shopping behavior, abuse outcomes, substance abuse facility admissions, crime rates, and fatal drug overdoses (Buchmueller and Carey, 2018;Patrick et al, 2016;Dave et al, 2017;Borgschulte et al, forth. ;Mallatt, 2017).…”