remunerations schemes on the physicians'side. The two-sided market approach is characterized by the concept of common network … externality (CNE)introduced by Bardey et al. (2010). This type of externality occurs when occurs when both sides value, possibly …

We study competition in two sided markets with common network externality rather than with the standard inter-group e … the speci…c but realistic case where the common network externality is homogeneous of degree zero, platforms pro…t do not … depend on the intensity of the (common) network externality. This is in sharp contrast to conventional results stating that …