This paper compares four cases and explores the effects on network performance of network governance, coordination mechanisms, and the abilities of the network manager. The focus is on shared-governance networks, which are in general considered to have difficulties achieving high-level performances. The cross-case comparison suggests a relationship between coordination mechanisms and the way shared-governance networks are managed: in order to be successful, they must be able to rely on formalized mechanisms and make a pool of "network administrators” responsible for their governance