October 27, 2022

Hot off the press our paper on how group changes affect cooperation. We analyze a large dataset from an online public goods game comprising around 1.5 million contribution decisions made by 135 thousand players in 11.3 thousand groups with 234 thousand recorded changes in the composition of these groups. We find that changes in group composition negatively relate to cooperation in public good provision, mainly because newcomers contribute less than incumbents. During the process of moving from newcomer status to incumbent status, individuals increase their contribution to the public good.
Open access to full paper here »»

September 15, 2022

Proud to be awarded the Ig Nobel Peace Prize 2022 together with ten other colleagues. The prize recognizes creativity and humor, two dwindling ingredients of scientific inquiry in times of crises and impact.
Watch the full award ceremony here »»