In this paper, we study a voluntary contribution mechanism withone-way communication. The relevance of one person’s words is assessedby assigning exogeniously the role of the ‘communicator’ to onegroup member. Contrary to the view that the mutual exchange ofpromises is necessary for the...

One-way communication has been found to substantially increasecontributions in linear voluntary contribution mechanisms. We confirmthe robustness of this result in the presence of income heterogeneity.