How does scarcity affect individual willingness to share and willingness to enforce sharing from others? Sharing in poor communities gains importance as an insurance mechanism during adverse shocks, yet shocks make it costlier to share. I conducted repeated economic experiments in both a lean...

Sharing provides one of few sources of insurance in poor communities. It gains prominence during adverse shocks, often largely aggregate, when it is also costliest for individuals to share. Yet it is little understood how scarcity affects individual willingness to share and willingness to...