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This paper explores some of the main contributions developed bylegal theory in favour of social rights enforcement. The first part is devotedto the concept of subjective right and particularly to the conceptions due toRobert Alexy and Luigi Ferrajoli. The second part includes the analysis ofthe relationship between social rights and the principle of equality. Specialattention will be given to Luis Prieto’s theory. Finally, both post-positivisticand neo-constitutionalistic theories of Law will be evaluated in terms of theirdegree of recognition and defence of social rights. / En este trabajo se exponen algunas de las principales contribuciones de la teoría del Derecho a la exigibilidad de los derechos sociales. La primera parte está dedicada al concepto de derecho subjetivo y especialmente a las propuestas de Robert Alexy y Luigi Ferrajoli. En la segunda parte, se analiza la relación de los derechos sociales con el principio de igualdad y, más concretamente, la propuesta de Luis Prieto. Finalmente, se exploran las posibilidades que tanto la teoría pospositivista del Derecho como la neoconstitucionalista ofrecen para un mayor grado de reconocimiento y eficacia de los derechos sociales.

Recent and past events in the South Durban Basin (SDB) have highlighted the possible connection between perceived air pollution concerns and deteriorating health. The aim of this study is to explore how the SDB community perceives air pollution and if this can be related to some of the health problems that are experienced in these communities. The ultimate aim is to determine whether the respondents connect air pollution to specific illnesses and also how they perceive the actions used to combat air pollution and its negative health impacts. This information is gathered through a questionnaire conducted in various study areas both within and outside the SDB, then compared with demographic variables. This is done to determine if perception is related to direct industrial activity or if there are other factors influencing results. Variables such as race and level of education had little impact on the results. The results showed that areas within the SDB experience a high neighborhood satisfaction despite the current general belief of air pollution being connected to ill health. The control areas outside of the SDB support theories of gender and race and its relationship to air pollution, currently presented by researchers in the perception field. Strong associations’ do exist between general environmental satisfaction and gender. Perception of current legal enforcement is exerting a strong effect on air pollution perception formation. Vitally important is the connection of daily concrete experiences of air pollution with the lack of transparency and communication between industry and communities. It is resulting in the current perception of illness being connected to tangible air pollution. The aim is to further future studies on establishing links between health and air quality. Gaining insight from the study of public risk perceptions based on local knowledge and experience in particular places, will help shape the role of environmental policy and management response systems. / Geography / M.A. (Geography)

Die Arbeit befasst sich mit ökonomischen Effekten der rechtlichen Durchsetzung von Staatsschulden. Die Literatur nimmt weitgehend an, dass diese größtenteils irrelevant sind. Die Dissertation präsentiert neu erstellte Datensätze über Anlegerklagen in den USA und UK, und verbindet diese mit Finanzmarktdaten. Die zentralen Ergebnisse sind: (1) Staatsschuldenkrisen sind zunehmend begleitet von Anlegerklagen, wenn auch die Zahl gering ist. Klagen sind wahrscheinlicher wenn Regierungen hohe Verluste auf ihre Gläubiger abwälzen. Sie können zudem signifikante Kosten durch die Versperrung des Finanzmarktzugangs mit sich bringen. Insbesondere spezialisierte Investoren führen Klagen, und die vertragliche Gestaltung der Anleihen bedingt Teilnahme- und Klageraten. (2) Marktpreise spiegeln diese Entwicklungen wider. Die Marktliquidität nimmt während Schuldenkrisen signifikant ab und Staatsanleihen, die bessere rechtliche Durchsetzungsmöglichkeiten versprechen, werden zu höheren Preisen gehandelt. / This thesis studies the economic impact of legal enforcement of sovereign debt. The literature assumes that legal enforcement mechanisms are largely irrelevant. The thesis presents newly assembled datasets on lawsuits filed by private investors against governments in the US and the UK, and connects them with financial market data. The main findings are: (1) Sovereign defaults are increasingly subject to investor lawsuits, although the numbers are still small. Lawsuits are more likely if governments impose large losses on their creditors. Litigation can create significant costs by affecting governments'' financial market access. Distressed investors are especially likely to file suit, and contract design is a significant predictor of participation and litigation. (2) Sovereign bond pricing reflects these developments. Market liquidity decreases significantly during debt crises. Furthermore, sovereign bonds with stronger legal protection trade at higher prices during financial crises.

Recent and past events in the South Durban Basin (SDB) have highlighted the possible connection between perceived air pollution concerns and deteriorating health. The aim of this study is to explore how the SDB community perceives air pollution and if this can be related to some of the health problems that are experienced in these communities. The ultimate aim is to determine whether the respondents connect air pollution to specific illnesses and also how they perceive the actions used to combat air pollution and its negative health impacts. This information is gathered through a questionnaire conducted in various study areas both within and outside the SDB, then compared with demographic variables. This is done to determine if perception is related to direct industrial activity or if there are other factors influencing results. Variables such as race and level of education had little impact on the results. The results showed that areas within the SDB experience a high neighborhood satisfaction despite the current general belief of air pollution being connected to ill health. The control areas outside of the SDB support theories of gender and race and its relationship to air pollution, currently presented by researchers in the perception field. Strong associations’ do exist between general environmental satisfaction and gender. Perception of current legal enforcement is exerting a strong effect on air pollution perception formation. Vitally important is the connection of daily concrete experiences of air pollution with the lack of transparency and communication between industry and communities. It is resulting in the current perception of illness being connected to tangible air pollution. The aim is to further future studies on establishing links between health and air quality. Gaining insight from the study of public risk perceptions based on local knowledge and experience in particular places, will help shape the role of environmental policy and management response systems. / Geography / M.A. (Geography)