Offers reflections on the study of the determinants of voluntary turnover based on empirical research conducted since 1972 at the University of Iowa (Iowa City) by Price, Mueller and their colleagues. The largest share of this research is constituted by 33 studies, mostly theses and dissertations. Reflections are offered about the causal model used and the measures advanced. Alternative models of voluntary turnover are described and possible future research is indicated. A measurement Appendix is also presented. The purpose of the paper is to improve the explanation of voluntary turnover.