Peer Effects

In rural India, subsidising family planning services gets women to the clinic, but pairing subsidies with a ‘Bring-a-Friend’ voucher changes who accompanies them, reduces stigma, and delivers meaningful gains in contraceptive use.

In Mexico, children in safe areas suffer lasting academic harm when peers who fled local violence transfer to their schools – even though they were never directly exposed to that violence themselves. This hidden cost of violence is especially pronoun...