Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We conduct a randomized field experiment with a Yale service club and find that the promise of public recognition increases giving. Some may claim that they give when offered public recognition in order to motivate others to give too, rather than for the more obvious expected private gain from increasing one's social standing. To tease apart these two theories, we also conduct a laboratory experiment with undergraduates. We find that patterns of giving are more consistent with a desire to improve social image than a purely altruistic desire to motivate others’ contributions. We discuss the external validity of our lab findings for other settings.