@TechReport{iza:izadps:dp15096,
            	author={Haylock, Michael and Kampkötter, Patrick and Macis, Mario and Sauter, Jürgen and Seitz, Susanne and Slonim, Robert and Wiesen, Daniel and Schmidt, Alexander H.},
            	title={Improving the Availability of Unrelated Stem Cell Donors: Evidence from a Major Donor Registry},
            	year={2022},
	month={Feb},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={15096},
            	url={https://www.iza.org/index.php/publications/dp15096},
	abstract={The unavailability of potential stem cell donors poses a critical challenge for donor registries worldwide. This study investigates the impact of initiatives of a stem cell donor registry to enhance donors' availability for confirmatory typing. Initiatives ask donors to provide a sample for genetic analysis and/or information on their temporal unavailability. We analyzed 91,479 confirmatory typing requests from DKMS Germany, a large stem cell donor registry, exploiting a quasi-random initiative assignment based on observable characteristics. We find that, first, invitation to the initiatives increases donors' availability. Intention-to-treat estimates yield effects ranging from 2.5 to 3.2 percentage points, and local average treatment effects estimates range from 3.8 to 8.2 percentage points (baseline: 77.1%). Second, the difference in availability between participants and non-participants is over 10 percentage points. The initiatives yield a direct positive effect on donor availability and a selection effect through which participation signals a higher commitment.},
	keywords={intention-to-treat;sorting;registry
initiatives;donor availability;unrelated stem cell donation;local average treatment effects},
            }