Purpose - The purpose of this paper is to examine the change in pension fund board diversity after self-regulation was introduced, and investigate which pension fund characteristics influence compliance with self-regulation. In addition, the authors analyze whether compliance might be achieved by tokenism. Design/methodology/approach - The authors hand-collect pension fund and pension fund board data of the largest (by assets) 200 pension funds in the Netherlands. The authors compare descriptive statistics on board diversity, perform statistical tests on these, and perform non-linear regression techniques to investigate which pension fund characteristics influence compliance. Findings - The findings are fourfold. First, over the past three years, pension fund boards have only marginally improved on gender and age diversity. In April 2014, still more than 35 percent of the funds had no women on the board, and an overwhelming 60 percent had no members below 40 years of age. This indicates that self-regulation in the pension fund industry so far has not been effective for the industry as a whole. Second, the authors find that pension funds that have larger boards are more likely to have at least one woman on the board or at least one member below 40 years of age. Third, boards of pension funds with more assets are less likely to have young board members. Fourth, boards with at least one female have a higher probability of also having at least one member below 40 years, which is suggestive of tokenism. Research limitations/implications - Based on Hirschman's (1970) theory of voice and exit, the authors expect that pension fund boards would be more diverse than corporate boards. However, the authors find that this is not the case. Second, given the importance of generational value transfers in pension fund policy decisions, the authors expect that age is a more important diversity characteristic than gender for pension fund boards in the Netherlands. Again, the data does not support this prediction. Practical ...