“…While pitting these two policy solutions against each other, in principle, presents a false choice, in practice, constraints on political capital may require policy makers to invest in a limited set of actions. With respect to the efficacy of broad-based police reform efforts, while there continues to be a dearth of high-quality evidence in this domain (Engel et al, 2020;Sherman, 2018), there is, at least, some evidence to support the efficacy of de-escalation training (Engel et al, 2020) and procedural justice training (Nagin & Telep, 2020;Owens et al, 2018;Wood et al, 2020), federal oversight of police agencies (Powell et al, 2017;Goh, 2020) as well as the use of and training in nonlethal weapons (J. M. MacDonald et al, 2009;Sousa et al, 2010). There is likewise support for the idea that reforms involving police unions may be effective (Dharmapala et al, 2019), especially if unions can be incentivized to "self-regulate" that might potentially be encouraged by transferring the burden of liability insurance from municipalities to unions (Ramirez et al, 2018).…”