Online problem section Statistica Neerlandica publishes research and expository material about new developments in probability statistics and operations research and their applications in medical agricultural econometric physical or social sciences and industry commerce and government. The emphasis is on clarity accessibility for the general reader and applicability. In particular Statistica Neerlandica shows how for certain practical problems statistics or operations research can play a valuable role in decision making. Coverage includes: operations research applied probability quality control econometrics biometrics psychometrics environmetrics mathematical statistics probability theory.