Cortés Aguilar, A., Palacio García, L.A. and Parra Carreño, D.F. 2014. Partners vs. Strangers: Identification of the Group Membership in the Contribution to Public Goods. Ecos de Economía. 18, 38 (Jun. 2014), 135–155. DOI:https://doi.org/10.17230/ecos.2014.38.5.