Jan-Willem Romeijn
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Research project on single case chance
This research project targets the concept of chance: numbers between 0 and 1 that can be assigned to events and that do not express a shaky personal opinion, but rather an objective characteristic of the events themselves. In the project we investigate how chances relate to the, often deterministic, mechanisms underlying the events, thereby contributing to debates over the reference class problem, randomness, and reductionism. Additionally, the research will help to improve the statistical methods by which we can determine chances, especially in the area of model selection and causal modelling using Bayesian networks. Next to my own research the project funds two PhD students. More information can be found on the project page.

PhD supervision
Next to Ronnie Hermens and Patryk Dziurosz-Serafinowicz, the two students working in my VIDI-project, I supervise a number of PhD students.

  • In 2015 Max Bialek joined the Department of Theoretical Philosophy. Max is also a graduate student at the University of Maryland at College Park.
  • Since 2014 I am working with Marta Sznajder on a project in inductive logic and conceptual spaces. Marta is also a PhD student at the MCMP of the LMU in Munich.
  • Since 2014 Ot de Wiljes is a PhD students on a project supersised by Fred Keijzer, while I act as his promotor. Ot works on computational models of nervous systems, as a topic in theoretical biology and in the philosophy of mind.
  • Since 2013 Tom Sterkenburg is a PhD students on a project jointly supervised by Peter Grunwald and myself. He works on a philosophical appraisal and a further development of Solomonoff's theory of universal prediction.
  • In 2012 Pieter van der Kolk joined our department. He is writing a PhD thesis on rational disagreement among epistemic peers and argues in favour of permissivist epistemology.
  • From 2011 until 2015 Franziska Köder was a PhD student at the Department for Theoretical Philosophy, supervised by Emar Maier and Petra Hendriks. I have a formal role as her promotor.
  • From 2011 until 2015 I co-supervised the thesis of Hanna van Loo. She works in the groups of Robert Schoevers and Peter de Jonge, both at the Faculty of Medical Science. Her research concerns the epidemiology and conceptual foundations of mental disorders, specifically depression.
  • From 2009 until 2012 I collaborated with Rogier Kievit, who works in the group of Denny Borsboom. We investigated the use of measurement models for giving empirical content to positions in the reductionism debate.
  • Between 2007 and 2010 I was co-supervisor of Rens van de Schoot, who works in the group of Herbert Hoijtink from Utrecht University on the project Learning More from Empirical Data Using Prior Knowledge.
Research network on rationality and decision
Our models for theoretical rationality in reasoning have seen major changes and additions in recent years: logicians have taken a dynamic turn, and probabilists have discovered network tools and new representations of uncertainty. In 2009 Olivier Roy and I won a research grant to hold a series of workshop with a European network of experts. We have held a number of workshops and completed two special issues, one of Erkenntnis and one of Economics and Philosophy. More on the project can be found here.

Between 2007 and 2010 Rolf Haenni, Greg Wheeler, and Jon Williamson and I formed the research group Progicnet. We have produced a joint book about combining probabilistic reasoning and logic, which came out in 2010 in the Synthese library. We also form the steering committee of the Progic conferences. Follow the link to see the full list of conferences. See Progic 2009 for the workshop in Groningen.