@TechReport{iza:izadps:dp2064,
            	author={Stutzer, Alois and Götte, Lorenz and Zehnder, Michael},
            	title={Active Decisions and Pro-social Behavior: A Field Experiment on Blood Donation},
            	year={2006},
	month={Apr},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={2064},
            	url={https://www.iza.org/publications/dp2064},
	abstract={In this paper, we propose a decision framework where people are individually asked to either actively consent or dissent to some pro-social behavior. We hypothesize that confronting individuals with the choice of engaging in a specific pro-social behavior contributes to the formation of issue-specific altruistic preferences while simultaneously involving a commitment. The hypothesis is tested in a large-scale field experiment on blood donation. We find that this "active-decision" intervention substantially increases the stated willingness to donate blood, as well as the actual donation behavior of people who have not fully formed preferences beforehand.},
	keywords={field experiment;pro-social behavior;active decision;blood donation},
            }