Machine derived contents note: 1 Introduction: moving people and knowledge - defining the -- research agenda -- PART I UNDERSTANDING MIGRATION BEHAVIOUR -- AND PATTERNS -- 2 Circulators, returners and settlers: migration trajectories and -- patterns 29 -- 3 Migration processes and their determinants: -- "professional' factors 59 -- 4 The impact of partnering on migration processes and outcomes 90 -- 5 Multiple life-courses? The impact of children on migration -- processes 113 -- 6 The role of networks and connections in shaping migration -- processes and effects 128 -- PART II ASSESSING IMPACT: THE EXPERIENCE OF -- RECEIVING AND SENDING COUNTRIES -- 7 Brain gain? Assessing the value of scientific migration to -- receiving countries 155 -- 8 Brain drain? The experiences of sending countries 187 -- 9 Summary, conclusions and policy implications 230 -- linex 1 Summary of MOBEX 2 methods 243 -- i4nnex 2 Respondents' pseudonyms 245 -- Anne.x 3 Summaries of flirther CSLPE projects 246 -- Refkrences 251 -- In2dex 267.