Frank Laczko is former Director of the IOM Global Migration Data Analysis Centre in Berlin. Prior to this, he was Head of Research at IOM HQ in Geneva. He was the Co-Chair of the UN Expert Group on International Migration Statistics (2018-2022). He has acted as an adviser to several international agencies including WHO, UNHCR, ILO and OECD. His current research focuses on migration from and to China. He has published extensively on a wide range of migration topics and is also an expert on social policy issues relating to poverty, labour markets and ageing. He is the co-author of Changing Work and Retirement (1991).

Elisa Mosler Vidal has worked in migration policy and research for eight years, most recently for the International Organization for Migration (IOM) at its Global Migration Data Analysis Centre (GMDAC) in Berlin. There she led work focusing on migration data for development and data for the Sustainable Development Goals (SDGs). She has authored numerous research reports and technical guidance documents on migration and co-authored IOM's Migration Data Strategy (2020-2025). She is currently working towards a DPhil in Migration Studies at the University of Oxford, exploring the links between migration, development and health.

Marzia Rango has over ten years of experience working in migration data, research and public policy. She is currently a Migration and Human Mobility Specialist at the UN Operations and Crisis Centre (UNOCC) in the UN Secretariat in New York. Previously, she led work on responsible data innovation and data capacity building for governments at the Global Migration Data Analysis Centre (GMDAC) of the International Organization for Migration (IOM) in Berlin. She was the co-convenor of the Big Data for Migration Alliance (BD4M) and is co-editor of Harnessing Data Innovation for Migration Policy (IOM, 2023) and Migration in West and North Africa and across the Mediterranean (IOM, 2020).

1. Introduction: Why Migration Data Matters. Part I. The State of Migration Data. 2. International Migration Data: An Overview. 3. How International Migration Data are Managed: Challenges and Solutions 4. Big Data: How Much Can They Tell Us About Migrants and Migration Policy? Part II. Data Availability on Key Migration Topics. 5. Migration and Sustainable Development: Measuring Progress. 6. Data on Migration and Climate Change: Making Sense of the Numbers. 7. Improving Data on Migration and Health After the Global Pandemic. 8. Way Forward.