1. Who trusts others?;Alesina;J. Public Econ.,2002
2. Fractionalization;Alesina;J. Econ. Growth,2003
3. Induced heterogeneity in trust experiments;Anderson;Exp. Econ.,2006
4. Gifts and exchanges;Arrow;Philos. Public Aff.,1972
5. The Evolution of Cooperation;Axelrod,1984