This book examines the major economic challenges associated with the sustainability of public pensions, specifically demographic change, labor-market relations, and risk sharing. The issue of public pensions occupies the political and economic agendas of many major governments in the world. International organizations such as the World Bank and the OECD warn that the economic changes driven by an aging society negatively affects the sustainability of pension systems. This book analyzes different global public pension systems to offer policies, methods and tools for sustainable public pensions. Real case studies from France, Sweden, Latin America, Algeria, USA and Mexico are featured.