TY - RPRT AU - Humlum, Maria Knoth AU - Morthorst, Marius Opstrup AU - Thingholm, Peter Rønø TI - Sibling Spillovers and the Choice to Get Vaccinated: Evidence from a Regression Discontinuity Design PY - 2022/Feb/ PB - Institute of Labor Economics (IZA) CY - Bonn T2 - IZA Discussion Paper IS - 15109 UR - https://www.iza.org/publications/dp15109 AB - We investigate the effects of the introduction of a population-wide Human Papillomavirus (HPV) vaccination program on the vaccine take-up of the targeted group of 15-year-old girls and their older sisters. For identification, we rely on a regression discontinuity design and high-quality Danish administrative data to exploit that date of birth determines program eligibility. We find that the program increased the HPV vaccine take-up of both the targeted girls and their older sisters. While the direct effects of the program reduced vaccine-takeup inequality, the spillover effects, in contrast, contributed to an increase in vaccine take-up inequality. KW - health investments KW - health behavior KW - peer effects KW - sibling spillovers KW - HPV KW - vaccine KW - health inequality ER -