Abstract
Due to emerging mobile social networks and powerful mobile devices, it is promising to leverage the crowd for creating public information and infrastructures. Many sharing platforms aim at helping users share public information or service that are useful for the community. However, platforms have overlooked the incentive issues and suffer from inefficient Nash equilibrium. We investigate incentive issues for public information and infrastructures sharing platforms. We consider different types of sharing platforms: social information sharing platform in static and dynamic environment and peer-to-peer sharing platform.