One-way communication has been found to increase contributions in linear Voluntary Contribution Mechanisms (VCMs). We confirm the robustness of this result in the presence of income heterogeneity. Our analysis indicates that the communicator directs the members of his group to the highest pay-off that they may attain.
Koukoumelis, A., Levati, M. V., & Weisser, J. (2012). A voluntary contribution experiment with one-way communication and income heterogeneity. Applied Economics Letters, 19(16), 1549-1552. https://doi.org/10.1080/13504851.2011.639724