In this chapter, the problems of determining how the ownership of the resources affect the InP and service provider's incentives to invest and how to choose the most efficient investments in an MVN are studied. First, a general system model is developed in multiple infrastructure provider and service providers engaged in a complementary relationship to exchange multiple physical and virtual resources. Subsequently, for this formulated problem, the optimal investments are derived. Furthermore, the chapter gives detailed analysis of a special case and sheds light on the problem of ownership and investment efficiency by answering the question of whether the ownership of resources should be integrated or operated separately by the service provider and infrastructure provider. Simulation results assess the parameters that affect the efficiency of investment through simulations.