“…It should be noted that one paper (Guindon, 2014) deals with both a program targeted at children and a program for a larger population. 4 With respect to methodology, three articles used a difference-in-difference design (Nguyen & Wang, 2013;Gruber et al, 2014;Guindon, 2014), one paper used propensity score matching (Lu et al, 2012), four papers used difference-indifference and propensity score matching combined (Wagstaff & Pradhan, 2005;Wagstaff & Yu, 2007;Giedion & Uribe, 2009;Chen & Jin, 2012), three papers used a randomised controlled trial (Kraft et al, 2009;Quimbo et al, 2011;Fink et al, 2013), and two papers used a regression discontinuity design (Miller et al, 2013;Palmer et al, 2015). Note: * One study (Guindon, 2014) covers a program targeted at children and another program that is not targeted, hence the number of studies here sums to 14.…”