Introduction: Discovering the logic of flexible integration -- Conceptual framework for analyzing differentiation -- Differentiated integration theory -- Empirical evidence from EU policies -- Trade integration -- Monetary integration -- Social, environmental, and tax policies -- Justice and...

This article tries to explain national incentives for protecting environmental goods either autonomously or collectively; it explores how globalisation has affected those incentives; and it suggests how national environmental policy might respond so as to ensure its effectiveness. The central...

This contribution develops a theory on the impact of differentiation on integration and unity among EU member states and discusses empirical evidence from four policy areas. According to the theory, the centripetal effects of closer cooperation among willing EU members on initially unwilling...