Co‐operation over international migration is in gridlock. Despite their growing need for foreign labour OECD countries have implemented increasingly restrictive migration policies, without always taking into account their effects on other countries. But why,
exactly, have policy makers been so reluctant to co‐operate on migration issues? And what are the implications of noncooperation? Do migration policies only affect migrant‐sending countries or do they also have a cost for the countries implementing them?
These questions are occupying increasing political space in OECD countries, and also in many developing countries, which have become, simultaneously, places of origin, transit and destination. Beyond the impact of emigration on development, a number
of countries in the South are also facing the challenges of immigration, particularly in terms of social cohesion.