AbstractThis chapter will focus on labour migration, that is the movement of persons with the aim of employment or income-bringing activities (e.g., entrepreneurship), developing the topic which was also touched upon in Chap. 3 on conceptual understanding of migration drivers. Research on labour migration has developed across various disciplines (e.g., sociology, anthropology, and geography), but most prominently in economics. It has resulted in a range of theoretical frameworks, starting with neoclassical economic theories and advancing through the New Economics of Labour Migration (NELM), dual labour market theory, and social network theory, to more recent transnational approaches or theories dedicated to particular forms of labour migration. These diverse approaches offer insights into labour migration on macro-, meso- and micro-levels. Although a dichotomy based on skills (high-skilled vs. low-skilled workers) can be seen as controversial or misleading as a division between workers representing these two types of skills is often vague or difficult to determine, the distinction does reflect recent debates on labour migration. Thus, a high−/low-skills dichotomy serves as a guide to the structure of this chapter.