“…Berry (2012) compared two incentive treatments but did not include a pure control group. Banerjee, Banerji, Duflo, Glennerster, and Khemani (2010) report results for binary indicators of learning outcomes, whereas the outcome measures in several papers did not include language or mathematics (Beuermann, Cristia, Cruz-Aguayo, Cueto, & Malamud, 2012;Clarke et al, 2008;Kvalsvig, Cooppan, & Connolly, 1991;Lien et al, 2009;Newman et al, 2002;Seshadri & Gopaldas, 1989).…”