This report looks at ways to improve the resilience of systems to deal with the unexpected arrival of large inflows of refugees and other vulnerable migrants. It begins with an overview of the recent flows of migrants seeking protection, discusses the expected economic impact of these flows, and notes what has been an unprecedented multilateral response. It then examines the process of integrating refugees and other vulnerable migrants, in terms of their economic and social outcomes, as well as specific factors of vulnerability. It also provides a comprehensive assessment of the transition policies in place to support their livelihood in destination and transit countries, as well as in origin countries upon return. Finally, the report tackles issues of anticipation, monitoring and reacting, examining the role of early warning mechanisms and the challenge of improving information so as to better monitor integration outcomes and frame policies.