The purpose of this research is to examine the patterns of Latvian emigration post EU-accession and the prospects for future development. Simultaneously, it set out to challenge the conventional wisdom and political discourse on immigration exemplified through the recent debate regarding the UK’s EU referendum. This is done through meticulous theoretical testing of the major theories in migration studies and their basic assumption. The first part of the research thus reviews and tests the theoretical assumptions of neoclassic theory (Borjas, 1989), new economics of labor migration theory (Stark & Bloom, 1985), segmented labor market theory (Piore, 1980), social capital theory (Gross & Lindquist, 1995), cumulative causation theory (Massey et al, 2005), world system theory (Sassen, 1988). The research is structured by the theories while the analysis is driven by data and empirical findings outlining the development in migration patterns and economic and structural factors through quantitative research. The research finds that the multiple factors dominant in initiating and perpetuating migration flows operate on many aggregated levels each important in a comprehensive understanding of migration. These are compiled into a comprised model of Intra-EU migration providing a theoretical perspective on the initiation, perpetuation and future development of migration flows. The second part of the research examines the prospects for the future development of Latvian migration flows utilizing the comprised mode of theoretical assumptions. This is achieved by analyzing several aspects found to have possible grand effect on the future development. Thus prospects of future developments in Latvian economic convergence, migration and social policies are reviewed. Furthermore, the effects of the possible Brexit are evaluated. The findings of the research suggest that Latvian emigration is returning to more sustainable levels. Continued demographic changes and increasing skilled labour shortages however, poses challenges to the prospects of continued economic growth and convergence. Thus further active and reactive policy initiatives are necessary to meet these challenges.