This edited volume highlights the deep issues of the educational markets and school segregation from its origins to its effects. The book discusses both global trends as well as focalized examples. It based on a comprehensive review of existing literature and an in-depth analysis of two educational systems: The French-speaking community in Belgium and Chile. Both contexts are characterized by a high degree of segregation, a structural environment of free choice of schools and competition between public and private schools financed with public resources.  This book provides an up-to-date synthesis of scientific knowledge on the issue of segregation and rigorous analyses of recent policies aimed at reducing segregation in educational systems. It highlights the complexity of a process of change, the importance of its legitimacy among the population and the need of identifying the ethical and social justice issues surrounding school segregation. By providing a solid theoretical and empirical synthesis, this book is a great resource to students, researchers and academics in education, as well as social scientists and policy-makers.