We outline a model in which preservation of UNESCO heritage sites is analyzed as a classical global public good problem where the decentralized Nash equilibrium yields suboptimal contribution vis-à-vis the Social Planner equilibrium. The absence of a Global Social Planner and the need of...

International surveys of learning achievement and functional literacy are increasingly common. We consider two aspects of the robustness of their results. First, we compare results from four surveys: TIMSS, PISA, PIRLS and IALS. This contrasts with the standard approach which is to analyse a...