Publications

PhD thesis

Verhagen, A.M.C. (2022). Direct and indirect effects of public policies and interventions. [Doctoral Thesis, Maastricht University].

This dissertation examines the direct and indirect effects of two policy interventions: a programme promoting physical activity among primary school children and opt-out consent for organ donation. While both policies achieve their primary objectives, they also have unintended consequences. The physical activity programme negatively affects school performance, particularly among lower-performing pupils, while higher deceased-donor transplantation rates under opt-out consent do not necessarily translate into comparable reductions in organ-patient mortality.

Publications in peer-reviewed journals

Golsteyn, B.H.H. & Verhagen, A.M.C. (2021), Deceased by Default: Consent Systems and Organ-Patient Mortality. PLoS ONE, 16(3): e0247719.

This study examines whether higher deceased-donor transplantation rates in countries with opt-out consent systems translate into lower mortality among patients awaiting organ transplants. We find that differences in organ-patient mortality are substantially smaller than differences in transplantation rates, partly reflecting incentives for living donation. The results suggest that transplantation rates alone provide an incomplete measure of the benefits of consent systems.


Golsteyn, B.H.H., Jansen, M.W.J., Van Kann, D.H.H. & Verhagen, A.M.C. (2020), Does Stimulating Physical Activity Affect School Performance? Journal of Policy Analysis and Management, 39(1): 64-95. 

Using a field quasi-experiment and difference-in-differences analysis, this study examines whether promoting physical activity among primary school children affects educational outcomes. While the intervention increased physical activity, it also negatively affected school performance, particularly among lower-performing pupils. The findings highlight potential trade-offs between promoting physical activity and educational achievement.

This article also appeared in The Latest Research in Health Policy - Virtual Issue of the Journal of Policy Analysis and Management. See also this chapter (in Dutch) in the KVS Preadviezen 2021: Ongelijk Nederland.