control sessions, incentives are formulated as a classic gain contract, while in treatment sessions, incentives are framed as … an isomorphic loss contract. Our results show that loss contracts reduce the minimum efforts of groups and worsen …

We experimentally test the efficacy of indenture as a self-enforced contract device. In an indenture game, the … games increases over time. -- Cooperation ; experiment ; contracts ; indenture ; reciprocity …