“…Two studies, Béné et al (2020) and Cocciolo et al (2020), presented their results as robust, based on the general rigour and quality of their methods and data collection. Similarly, eight studies checked potential biases or performed balance checks to prove the effective randomisation and internal validity of the evaluation (Aker et al, 2017;Angeles et al, 2019;Armand et al, 2019;Bandiera et al, 2017;Barnett et al, 2018;Diagne and Cabral, 2017;Källander et al, 2021;Pellegrini, 2018). Several studies also conducted sub-group analysis to assess heterogeneous effects (Gibbs et al, 2020;Khwaja et al, 2020;Najy et al, 2018;Roth et al, 2017;Saboya et al, 2018;Zegarra et al, 2017).…”