I’m a professor of economics at Vrije Universiteit Amsterdam and a founder working on AI for science.
My work focuses on creating data, methods and tools that make robust scientific findings easier to find and use, for people and for machines. I co-founded the Social Science Genetic Association Consortium, which brought large-sample, replicable methods to behavioural genetics, and DeSci Labs and the DeSci Foundation, which developed new approaches to make science more replicable and accessible.
My research is published in Nature, Science, Nature Genetics and PNAS, and has been funded by the European Research Council, the US National Institutes of Health and others.
My newest venture, Claims, produces validated scientific data for AI models and agents: it links every claim in a paper to its source evidence and rates the strength of that evidence.
Recent publications
Polygenic associations with educational attainment in East versus West Germany: Differences emerge after reunification. D. Fraemke, Y.E. Willems, A. Okbay, U. Lindenberger, …, P.D. Koellinger, L. Raffington. Psychological Science 36(7), 559–573, 2025. doi:10.1177/09567976251350965. Also on bioRxiv.
Deciphering the influence of socioeconomic status on brain structure: insights from Mendelian randomization. C. Xia, Y. Lu, Z. Zhou, M. Marchi, …, P.D. Koellinger, …, M.P. Boks, W.D. Hill. Molecular Psychiatry 30(10), 4613–4626, 2025. doi:10.1038/s41380-025-03047-4.
Associations between common genetic variants and income provide insights about the socio-economic health gradient. H. Kweon, C.A.P. Burik, Y. Ning, R. Ahlskog, …, D.J. Benjamin, P.D. Koellinger. Nature Human Behaviour 9(4), 794–805, 2025. doi:10.1038/s41562-024-02080-7. Also on bioRxiv.
Do polygenic indices capture "direct" effects on child externalizing behavior problems? Within-family analyses in two longitudinal birth cohorts. P.T. Tanksley, S.J. Brislin, J. Wertz, R. de Vlaming, …, P.D. Koellinger, …, A. Caspi, K.P. Harden. Clinical Psychological Science 13(2), 316–331, 2025. doi:10.1177/21677026241260260.