The World Trade Organization (WTO) istoday dealing with an issue that lies at the interface oftwo major challenges the world faces, trade liberalizationand international migration. Greater freedom for the"temporary movement of individual servicesuppliers" is being negotiated under the GeneralAgreement on Trade in Services (GATS). Conditions in manydeveloped economies - ranging from aging populations, toshortages of skilled labor - suggest that this may be apropitious time to put labor mobility, squarely on thenegotiating agenda. Yet, there is limited awareness of howthe GATS mechanism can be used to foster liberalization inthis area of services trade. At the same time there is greatconcern, about the possible social disruption in hostcountries, and brain drain from poor countries. As a firststep in improving our understanding of the implications ofsuch liberalization, this volume brings togethercontributions from service providers, regulators,researchers and trade negotiators. They provide differentperspectives on one central question: how is suchliberalization best accomplished, in a way that benefitsboth home, and host countries? The result, combininginsights from economics, law and politics, is bound to be avital input into the WTO services negotiations, as well asthe broader debate on the subject.