The current institutional reforms in the Dutch healthcare sector may increase the extent of vertical relations (such as vertical contracts and vertical integration) between insurers and healthcare providers. Vertical relations may have both welfare increasing and welfare reducing effects. In...

In this study, we analyse changes in market power in the Dutch supermarket chain and discuss the effects on welfare. The supermarket chain includes consumers, supermarkets, buyer groups and food manufactures. We look at the theoretical background of market power.  Special attention has been...