[1][2] In August 2014, van Hees became professor of Ethics at VU University Amsterdam.
[6] van Hees disputes the claim that there exists an incompatibility between Pareto efficiency and liberalism (Arrow's impossibility theorem).
He suggests that the paradox can be solved through legal-political games which add the right to stay passive on a given issue.
[7] After receiving degrees in political science and philosophy at the Erasmus University in Rotterdam, van Hees obtained his PhD in social sciences at the Radboud University Nijmegen in 1994 with the dissertation: Rights, liberalism and social choice: a logical and game-theoretical analysis of individual and collective rights.
[8] Van Hees became a member of the Royal Netherlands Academy of Arts and Sciences in 2013.