The four volumes in this series contain the findings of a major research project begun in 1993 under joint sponsorship of the International Organization for Migration (IOM) and the United Nations Population Fund (UNFPA). The objective set for the project was to explain the reasons for different types, and directions, of migration from and between developing countries and, from this analysis, to project likely future trends, as well as their consequences and policy implications. Research teams in each of the four regions collected and analysed appropriate data, and through the application of an appropriate model, explained the emigration dynamics process in each region. During the latter stages of the project, the researchers met with policy-makers and officials in each region to discuss the implications of the findings for government policies. The carefully researched chapters in these volumes represent a significant advance in knowledge and understanding of one of the most important issues of our time.