Pledges feature in international climate cooperation since the 2015 Paris Agreement. We explore how differences in … pledgers' trustworthiness affect outcomes in a social dilemma that parallels climate change. In an online experiment, two … the Paris Agreement, can leverage the power of trustworthiness to enhance cooperation. …

This paper compares the effects of two leadership styles: leading by pre-game communication and leading by example … using an iterated voluntary contribution game. We find that pre-game communication increases the level of individual …-game communication. We also find that the content of pre-game communication has a higher impact on individual decisions than the ex post …