Migration has always been generating a complex tension between individuals and nations. There are many perspectives on why people migrate, how people migrate, what impact migration has on what are called 'receiving' and 'sending' countries, and whether countries should encourage or limit migration. This thesis is devoted to analyzing a fundamental phenomenon which accompanies migration itself, namely human capital flight. This phenomenon is often depicted by its more popularized name, 'brain drain'. It concerns that highly skilled workers in developing countries seek a better future by migrating to developed countries. There has been an ongoing debate about the negative and positive effects of human capital flows. Most importantly, it can create problems for the sending country, given that expertise and skills are 'lost'. For that reason, my research will focus on the emigration of highly skilled workers and its impact on the sending countries as they are mainly the most disadvantageous participants of this human capital flow. Accordingly, the questions to be examined concern the competiting rights and duties hold between migrants and nation states.  To what extent, are developing states in their right to restrict this type of emigration? Whether freedom of movement can be reckoned as an indispensable human right?

This thesis examines the practice of accommodating irregular migrant children in Canadian public schools, specifically, public schools in Toronto, Ontario. Estimates indicate that there are close to 500,000 irregular migrants in Canada; half are thought to be living in the City of Toronto. Since the early 1990s there have been several novel policy developments in Ontario that have facilitated access to public schooling for irregular migrant children. This project seeks to identify the normative ideas that have been appealed to by public authorities in the policy development process. First, a critical review is undertaken of theoretical justifications developed in moral and political theory for extending schooling rights to irregular migrant children in liberal states. Then, arguments put forward by public authorities in Canada for extending or limiting schooling rights are analysed and compared with the dominant normative frameworks in the theoretical literature. This research finds that public authorities at the sub-state level made use of normative arguments that fall outside common theoretical approaches in moral and political theory. Normative arguments at the sub-state level are found to cohere with a fiduciary conception of public authority. It is argued that fiduciary theory provides a systematic and innovative theoretical framework for understanding the normative ideas appealed to by public authorities in practice. Moreover, fiduciary theory makes available the normative resources necessary to provide a strong way of conceptualising the duty of public authorities to educate irregular migrant children. This research contributes both to theoretical scholarship aimed at understanding and conceptualizing obligations to irregular migrant children, and also to the field of Canadian Studies, by contextualizing the policy response to irregular migrant children in Canada over time, demonstrating how specific policy responses reflect shifting normative understandings about belonging, government obligation, national culture(s) of citizenship, and the scope of provision of social welfare services to irregular migrant children.

The work deals with the impact of immigration and integration policies on the living conditions of third-country nationals in the country. It is divided into two parts, theoretical and practical. The theoretical part defines related terms and types of migration. Further describes the causes and effects of migration in the economic, social and demographic. This work also introduces the current migration theories. The work also reflects the integration and integration policy of the state to receive and foreigners living in the Czech Republic. The thesis introduces the living conditions of foreigners living in the Czech Republic, with their position in the labor market, with their terms of health and social security. The work is also given view of immigration and immigration policy, Christian social ethics. The practical part of the thesis research by talking to strangers, employees of the state administration and employers who employ foreigners and thus actively contribute to the successful integration of foreigners into Czech society, to verify the facts mentioned in the theoretical part, the search for the causes of these facts, respectively. possible solutions.