The document discusses research on enabling sharing and efficiency in wireless networks beyond LTE. It discusses how sharing can improve coverage through infrastructure sharing between operators and capacity through techniques like multi-user MIMO across small cells. Current areas of investigation include quantifying efficiency gains from increased resource sharing based on correlation in demand, incentive mechanisms for sharing, and virtualization to enable networks without borders composed from shared resources. The goal is to develop mechanisms and economic models to efficiently share resources across technologies and ownership models.