Danièle Christina Hafner - Donations in the Digital Age: Effects of Human-Machine Interaction on Donation Behavior - an Online Experiment Huan Xie - Delegation and Endowment Heterogeneity in a Threshold Public Goods Game Andrea Essl - Visibility and Social Approval: How Observers Shape Prosocial Behavior Anna Bayona - Probability and Magnitude in Public Goods with Gains and Losses Miguel A. Melendez-Jimenez - The Sharing Paradox