“…1 For example, some laboratory (Armantier and Boly 2015;Church et al, 2008;Hannan et al, 2005;Imas et al, 2017) and field experiments (Fryer et al, 2012;Hong et al, 2015;Hossain and List 2012) have found that individuals incentivised with contracts framed as losses perform better than those offered equivalent rewards. Meanwhile, other has failed to detect a difference between the two frames (de Quidt et al, 2017;DellaVigna and Pope 2018;Grolleau et al, 2016). 2 A number of studies have considered the effects of different types of incentives for quality (Bracha and Fershtman 2013;Carpenter et al, 2010;Eckartz et al, 2012;Hammermann and Mohnen 2014;Rubin et al, 2018;Shurchkov 2012), while others have studied the effects of incentivising quantity on quality (Al-Ubaydli et al, 2015;Fest et al, 2019;Green, 2014;Greiner et al, 2011;Tonin and Vlassopoulos 2015).…”