Claus Folden

Claus Folden has 25 years’ experience in migration, asylum, emergencies and international cooperation at political, policy, strategic and operational levels

He had senior management positions and has developed government and organization policies, strategies, operational and technical capacity. Institutional reform, strategic development and change management within government, UN and EU was a part of his career. Editor for a wide range of publications, research, directories and manuals.

Throughout his career developing data policy, strategy and capacity for governments and organisations has been a cornerstone of his work. Author; Sharing Data - Where to start An Emerging Approach to Migration Data Management. © 2007 International Organization for Migration. Adviser on More than numbers - How migration data can deliver real-life benefits for migrants and governments. © 2018 International Organization for Migration (IOM) and McKinsey & Company


Ann Singleton

Migration statistics expertise

Ann’s work focuses on international migration data, the production of knowledge on migration and the development of migration and asylum policy. She has advised the European Commission, the European Parliament, the Council of Ministers and EU Presidencies, national governments, NGOs and international organizations.

Between 1996 and 2002 she developed the Eurostat database on international migration and asylum. From 2002 to 2004 she was responsible for policy on statistics in the European Commission’s Directorate-General for Justice and Home Affairs. She wrote the European Commission’s Action Plans on migration and asylum statistics, prepared the first EU online annual report on migration and asylum and pioneered, with Eurostat, the first EU legislation on statistics on migration and international protection.  

Academic advisory roles

Advisory Board member, the Migration Observatory at the University of Oxford

Scientific Advisory Board member, the National Center of Competence in Research ‘nccr – on the move’, University of Neuchâtel

On secondment to Senior Adviser from the University of Bristol to the IOM Global Migration Data Analysis Centre (GMDAC), Berlin.


Jasper Dag Tjaden

Jasper Tjaden is Professor for Applied Social Research and Public Policy at the Economic and Social Sciences Department at the University of Potsdam and affiliate researcher at the Berlin Social Science Centre. Previously, Jasper worked as Impact & Data Coordinator at IOM GMDAC, research consultant at the World Bank Development Impact Evaluation team and policy officer at the Migration Policy Group. He holds a PhD in Quantitative Social Sciences from the University of Bamberg, Germany and a MA from the London School of Economics and Political Science. During his doctoral studies, he spent one year as a Fulbright scholar at the City University of New York, US, and the Minnesota Population Centre, US.


Philip Martin

Philip Martin is Professor of Agricultural and Resource Economics at the University of California-Davis, USA. He has served on several federal commissions, testifies frequently before Congress, and works for UN agencies around the world on labour and migration issues. Prof. Martin is an award-winning author whose research focuses on the impacts of migrant workers on labour markets in destination countries, the effects of emigration and remittances on sending countries as well as and the recruitment business that moves workers over borders. His most recent book is Managing Merchants of Labour: Recruiters and International Labour Migration (Oxford, 2017). He also edits Rural Migration News online.


Dr. Hania Zlotnik


Dr. Hania Zlotnik is a demographer who, until January 2012, served as Director of the Population Division of the United Nations. She joined the Population Division in 1982 and during her long career at the United Nations made major contributions to both formal demography and the study of international migration. Prior to this, she held successively the posts of Chief the Mortality and Migration Section and Chief of the Population Estimates and Projections Section, both at the Population Division. Under her direction, the Population Division provided the substantive support required by the General Assembly when it held its first High-level Dialogue on International Migration and Development in 2006.

Before joining the United Nations, Dr. Zlotnik worked as Research Associate for the Committee on Population and Demography of the US National Research Council. Moreover, she has served as Board Member for the Population Association of America and as Vice-President of the International Union for the Scientific Study of Population (IUSSP). She is currently Vice-President of the Scientific Council of the National Institute for Demographic Studies (INED) of France and Board member of Population Connection. Her work has spanned the field of demography, covering the analysis of fertility, mortality and migration. She holds a Ph.D. in Statistics and Demography from Princeton University and is a graduate of the Universidad Nacional Autónoma de México (UNAM).


Dr. Michel Poulain


Michel Poulain received his PhD in Demography from the Catholic University (UCL) of Leuven in Belgium. He is currently Emeritus Professor at UCL and Senior Researcher at Tallinn University in Estonia. In the field of international migration statistics, he started collaborating with Eurostat in 1989 and was responsible for the first policy-oriented research project on the harmonisation of international migration statistics in the EU-12 member states. Thereafter the project was enlarged to the European Free Trade Association (EFTA) members and to central European countries. In 1995 he contributed to the revision of the UN recommendations on international migration statistics.

In 2004 he was responsible of the EU-funded research project “Towards Harmonised European Statistics on International Migration” (THESIM) alongside with seven research institutions from other member states. Its purpose was to help EU member states implementing the 2007 adopted EU Regulation on community statistics on migration and international protection. Moreover, he supported the assessment for international migration data for EU´s Phare Program in Croatia and Western Balkan Countries and for the United Nations Population Fund (UNFPA) in Bosnia Herzegovina and FYROM. He was also in charge of the developing IOM´s Assessment report on international migration statistics in Ukraine and Turkey as well as on the Extended Migration Profile in Moldova and the Migration Profiles for Madagascar, Mauritius, Seychelles and Comoros. He is currently involved in IOM by conducting data assessment investigations in Tunisia, Djibouti and the Western Balkan countries.


Keiko Osaki-Tomita

Keiko Osaki-Tomita is Professor of School of International and Area Studies at Tokyo University of Foreign Studies. From 2009 to 2018, she served as Assistant Director as well as Chief of Demographic and Social Statistics Branch of the United Nations Statistics Division (UNSD) in New York from 2009 to 2018, where she led the global collection and dissemination of demographic and social statistics, including migration statistics, and the development of standards and norms for statistical activities in these areas under the auspices of the UN Statistical Commission. Prior to this position, she was Chief of the Social Policy and Population Section at United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP) in Bangkok, Thailand, and Chief of the Migration Section of UN Population Division at the UN Headquarters in New York. Osaki-Tomita holds a Ph.D. in Sociology from Fordham University and a MA degree in Demography from Georgetown University, USA.


Dr. Claire Melamed


Dr. Claire Melamed is the Executive Director of the Global Partnership for Sustainable Development Data, headquartered in Washington, DC.  She is based in London and was previously a Managing Director at the Overseas Development Institute, has worked for a number of international NGOs, the United Nations, and taught at the University of London and the Open University.  Claire writes regularly for the Guardian, World Politics Review and Aeon, among others.

She can be found on twitter at @clairemelamed.


Dr Richard Bilsborrow

Richard Bilsborrow is an economist-demographer with extensive experience designing and directing migration, poverty, fertility, and economic surveys at the household and community levels throughout the developing world. Dr. Bilsborrow is Research Professor of Biostatistics at the University of North Carolina at Chapel Hill, a Fellow of the Carolina Population Center, and Adjunct Professor in the Departments of City and Regional Planning, Ecology, Economics, and Geography.

Recent and ongoing research projects include:

  1. Methodological aspects of designing, conducting and analyzing surveys of international migration in the Middle East, CIS States, Latin America, and Sub-Saharan Africa;
  2. Determinants and consequences of internal migration in developing nations, and linkages with development and the environment;
  3. Impacts of Payments for Ecosystem services programs on migration and livelihoods of farm households in China;
  4. Demographic and other factors influencing land-use and deforestation and implications for the environment and sustainable development, notably in the Ecuadorian and Peruvian Amazon.

He has a PhD in Economics from the University of Michigan and a Certificate in Demography from Princeton University where he was a postdoc.

In 1997-98 Mr. Bilsborrow was a Hofstee Fellow at the Netherlands Interdisciplinary Demographic Institute in The Hague, conducting research on the Push-Pulls Project with Eurostat that designed surveys to collect and analyse data on international migration in five developing countries of origin and two European countries of destination. He has consulted widely with the United Nations Population Division and Statistical Division, the International Labour Office, the World Bank, the UN Food and Agricultural Organization, UNDP, and environmental organizations on population, international migration, and development including poverty measurement.


Dr. Delali Margaret Badasu

Dr. Delali Margaret Badasu is the Director of the Centre for Migration Studies at the University of Ghana and also Senior Research Fellow at the Regional Institute for Population Studies at the same university.

She was principal investigator for a research team that conducted a qualitative research study on immigrant labour in Ghana as a component of a bigger research titled ‘Assessing the economic contribution of labour migration in developing countries as countries of destination’, co-funded and jointly implemented by the European Commission, the International Labour Office (ILO) and the OECD Development Centre in ten low- and middle-income countries. She was also a member of a research team that conducted a study on developmental impacts of migration in Ghana, sponsored by the Global Development Network (GDN) and the Institute for Public Policy Research (IPPR) and co-principal investigator of a research team that conducted a study on north-south independent child migration in Ghana, funded by the Department for International Development (DFID).

She was the lead consultant for the development of ‘Ghana’s Migration Data Guide’, under the Euro-African Dialogue on Migration and Development project and is currently leading a team of consultants to develop a diaspora engagement policy for Ghana.


Julie Ray


Julie Ray is a writer and analyst at Gallup. She analyzes and writes about Gallup’s global research --with a primary emphasis on migration-- for international clients, leaders and the media. Ray has authored more than 200 articles for Gallup’s website and has co-authored several articles that have appeared in Harvard International Review and other international policy magazines, books and journals. The U.S. and international media often follow her reports on migration, global leadership and Central and South Asia.

Selected Publications and Presentations

Esipova, N., Srinivasan, R., and Ray, J. (2016). Global desires to migrate. In Douglas J. Besharov and Mark H. Lopez (Eds.), Adjusting to a world in motiontrends in global migration and migration policy (pps. 21-57). New York: Oxford University Press.

Pugliese, A., Ray, J., and Esipova, N. (October 2016). Do remittances differ depending on migration pathway and length of stay?. Remittances Review, 1(1), 105-118.

Ray, J. (2016, March 4). Who wants to move to Canada? Address presented at 18th Annual Metropolis Conference in Montreal, Canada.

International Organization for Migration (2015). How the world views migration. IOM. Neli Esipova, Julie Ray & Anita Pugliese, main authors.

International Organization for Migration (2013). World Migration Report 2013: Migrant Well-Being and Development. IOM. Contributing author.

OECD (2012), Connecting With Emigrants: A Global Profile of Diasporas, OECD Publishing. Contributing author.

Esipova, N., Ray, J., and Pugliese, A. (2011). Gallup world poll: The many faces of global migration. IOM Migration Research Series No. 43. Geneva, Switzerland: International Organization for Migration.

Esipova, N., Ray, J., and Pugliese, A. (2011). Gallup world poll: global desire, plans, and preparation to migrate. Migration Policy Practice, Vol. I, No. 2, 3-7.


Dr. Cris Beauchemin

Dr. Cris Beauchemin is research director at the French Institute for Demographic Studies-Institut National d'Études Démographiques (INED) and associate professor at the department of demography of the University of Montreal. Prior to joining INED, he spent 3 years at the University of Montreal (Demography Department).

Most of his research is about migration and connections between places of origin and destination. Covering both domestic and international migration, especially in the African context, his work is related especially to trends of migration, migrants’ investments, return migration, transnational families, integration and transnationalism. In the last decade, he was responsible of projects involving large-scale surveys such as “Migration between Africa and Europe project” (MAFE) and the “Trajectories and origin survey in France” (TeO). Besides, he is associate editor of the journal International Migration Review. He holds his PhD from University of Paris 8.


Diego Iturralde


Diego Iturralde, as Chief Director of Demography Unit at the Statistical Authority South Africa, is responsible for analytical output relating to demographic phenomena emanating from Census and household surveys. Since 1999 he held various position within the Statistical Authority, where he dealt with disseminating data products, researching and producing demographic outputs. Mr. Iturralde holds higher degrees from University of Pretoria, University of the Witwatersrand and Stellenbosch University.


Philippe Fargues

Philippe Fargues is a sociologist and demographer. He is a part-time Professor at the Robert Schuman Centre of the European University Institute (EUI) and Affiliate at Harvard Kennedy School. He was the founding Director of EUI’s Migration Policy Centre and held senior positions at the National Institute for Demographic Studies in Paris and the American University in Cairo. Besides he has taught at Harvard and in various universities in France, the Middle East and Africa. His research interests include migration, population and politics.

His recent publications include:

Skillful Survivals. Irregular Migration to the Gulf (with Nasra Shah, GRC-Cambridge, forthcoming 2017)

Migration from North Africa and the Middle East: Skilled Migrants, Development and Globalisation (IB Tauris, 2015)

Is What We Hear About Migration Really True? Questioning Eight Migration Stereotypes (EUI, 2014)

International Migration and the Nation State in Arab Countries (Middle East Law and Governance, 2013)

Demography, Migration and Revolt in the South of the Mediterranean (Brookings, 2012)

International Migration and the Demographic Transition: a Two-Way Interaction (International Migration Review, 2011)


Frans Willekens

Frans Willekens is Professor Emeritus of Population Studies, University of Groningen, the Netherlands, and former director of the Netherlands Interdisciplinary Demographic Institute (NIDI) in The Hague. He is now Honorary Fellow of NIDI. From April 2013 to March 2016, Frans Willekens was Senior Research Scientist and Chief Research Coordinator at the Max Planck Institute for Demographic Research (MPIDR) in Rostock, Germany. The principal focus of his research is international migration, in particular the simulation and agent-based modelling of international migration flows.


Steffen Angenendt


Steffen Angenendt has been a senior associate at the German Institute for International and Security Affairs (SWP) since 2006, where he is responsible for migration and demography and head of the institute’s Global Issues Division. From 2011 to 2013 he was released from his SWP position to advise the German Federal Ministry for Economic Cooperation and Development on migration issues.

Before joining the SWP, Mr. Angenendt worked for the German Council on Foreign Relations (DGAP) and with the Federal Commission on Immigration Reform (Süssmuth-Kommission). He is the author of numerous publications on German, European, and international migration policy and served as an advisor to several governments (i.a. China, Georgia, Armenia) and national and international organizations, including UNHCR, IOM, Unicef and the World Bank. Currently, he is i.a. advisor to the Foreign Office for the German chairmanship of the Global Forum on Migration and Development.

Mr. Angenendt taught political science and political sociology at the Free University and the Humboldt University in Berlin, in 2011 also at Vienna University in Austria. He holds a diploma and a PhD in political science.


Dr. Axel Kreienbrink

Axel Kreienbrink is Sub-diector of the Research Centre on Migration, Integration and Asylum at the Federal Office for Migration and Refugees in Nuremberg (Germany). After graduating in History and Political Science he obtained his PhD in Migration Research at the University of Osnabrück. He entered the Federal Office in 2005 and became Head of Unit in 2007. His research topics cover international migration, irregular migration, return migration, migration and development, Muslims in Germany, demographic aspects of migration, and research for the European Migration Network (EMN). He has several publications on migration history and migration policy in Germany, Spain and Europe, see:


Kristof Tamas


Kristof Tamas has been Director since 2014 at Delmi, the Migration Studies Delegation, based in Stockholm, Sweden.. He was previously senior adviser in the secretariat for the Swedish chairmanship of the Global Forum on Migration and Development, a Swedish national expert at the EU Commission, an independent research consultant inter alia at the Institute for Futures Studies in Stockholm, and a special adviser and later deputy director at the Ministry of Foreign Affairs and the Ministry of Justice in Sweden. He has over 20 years of experience and expertise in international and global collaboration in the field of migration, with an emphasis on migration and development, and labor migration. His publications include Bridging the Gaps: Linking Research to Public Debates and Policy Making on Migration and Integration, co-edited with Martin Ruhs and Joakim Palme, 2019, Oxford University Press.


Dr. Jakub Bijak

Dr Jakub BIJAK is Professor of Statistical Demography at the University of Southampton. He has a background in economics and over 20 years’ work experience in academia and international civil service. His research focuses on demographic uncertainty, population and migration models and forecasts, and the demography of armed conflict. He has been awarded the Allianz European Demographer Award (2015) and the Jerzy Z Holzer Medal (2007) for work on migration modelling. Leader of a European Research Council project “Bayesian agent-based population studies” (, and a Horizon 2020 project “QuantMig: Quantifying Migration Scenarios for Better Policy” ( His email is