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Submitted by Akib on

This is super-helpful as a high-level discussion on strategies to experimentation. On (1.b.), there is an RCT that tested NGO vs Govt implementation (of contract teachers in Kenya; spoiler: effects vanish with govt as the implementer):
link: https://www.cgdev.org/publication/scaling-what-works-experimental-evidence-external-validity-kenyan-education-working