A group of agents voluntarily participates in a joint project, in which efforts are not perfectly substitutable. The output is divided according to some given vector of shares. A share vector is unimprovable if no other share vector yields a higher sum of payoffs. When the elasticity of...

We have very few ideas as to what factors can influence the duration of roscas and reduce their failure risk. In this research, we bring new light on these empirical questions using an original data set containing information on living and dead roscas from Cotonou, Benin. We notice that the...