The SEE region faces a complex, nationally and regionally diverse set of demographic, migratory and labour market challenges (low or declining fertility, large scale out-migration, brain and care drain, ageing, low labour force participation rate). Together with further aspects like gender, age and the given territorial heterogeneity of the programme area, they are creating a complex challenge to economic development and cohesion. Only by joint, transnational actions can SEE countries tackle these challenges, which if no strategic measures are taken will negatively affect territorial cohesion and hinder economic growth. Migration by nature is transnational, and as such it creates a platform for joint action. But before these actions, understanding of these processes and challenges should be improved. SEEMIG aims to better understand and address the longer term migratory, human capital and demographic processes of the SEE area, as well as their effects on labour markets and national/regional economies in order to enable public administrations to develop and implement policies and strategies by using enhanced datasets and empirical evidence.