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Die vorliegende publikationsbasierte Dissertationsschrift beschäftigt sich mit dem Phänomen der „Sicherheitsbedrohungen“ aus europäischer und US-amerikanischer Perspektive. Sie bewegt sich damit auf dem Gebiet der Security Studies. Dabei geht die Arbeit von einem erweiterten Verständnis von Sicherheit aus, das über das traditionell militärische Sicherheitsverständnis hinausgeht. Bedrohungen können demzufolge aus verschiedensten Situationen hervorgehen – unter anderem aus Finanzkrisen oder transnationalem Terrorismus. Nichtsdestotrotz stehen auch für die New Security Studies (mit ihrem so verstandenen erweiterten Sicherheitsbegriff) ebenso jene Bedrohungsszenarien im Fokus, die aus zwischenstaatlichen Konflikten resultieren, wie beispielsweise aus dem Ukraine-Russland Konflikt der vergangenen Jahre.
Im Rahmen dieser Arbeit werden die folgenden, zentralen Forschungsziele verfolgt: das Gewinnen von theoretisch-fundierten empirischen Erkenntnissen mit Blick auf ausgewählte Problemfelder der europäischen und US-amerikanischen Außen- und Sicherheitspolitik und mit Blick auf die transatlantischen Beziehungen (1) sowie die Erweiterung und Vertiefung der Securitization-Theorie und ihrer Anwendungsfelder in der Internationalen Politik (2).
Securitization Theory has been applied and advanced continuously since the publication of the seminal work “Security – A New Framework for Analysis” by Buzan et al. in 1998. Various extensions, clarifications and definitions have been added over the years. Ontological and epistemological debates as well as debates about the normativity of the concept have taken place, furthering the approach incrementally and adapting it to new empirical cases. This paper aims at contributing to the improvement of the still useful framework in a more general way by amending it with well-established findings from another discipline: Psychology. The exploratory article will point out what elements of Securitization Theory might benefit most from incorporating insights from Psychology and in which ways they might change our understanding of the phenomenon. Some well-studied phenomena in the field of (Social) Psychology, it is argued here, play an important role for the construction and perception of security threats and the acceptance of the audience to grant the executive branch extraordinary measures to counter these threats: availability heuristic, loss-aversion and social identity theory are central psychological concepts that can help us to better understand how securitization works, and in which situations securitizing moves have great or little chances to reverberate. The empirical cases of the 9/11 and Paris terror attacks will serve to illustrate the potential of this approach, allowing for variances in key factors, among them: (point in) time, system of government and ideological orientation. As a hypotheses-generating pilot study, the paper will conclude by discussing further research possibilities in the field of Securitization.
The dissertation "Three Essays on Credit Risk with a Special Focus on the Subprime Financial Crisis" consists of three self-contained essays. At the core of the dissertation is the market for credit risk and its role during and after the recent subprime financial crisis. In particular, it is dedicated to the following research questions: - What are the causes of the subprime financial crisis? - Which role did credit markets and credit derivatives play during the crisis? - How might the crisis be resolved? - What is the impact of the crisis on market participants perception of credit risk? - How can complex credit derivatives be modeled in a way that allows an understanding of their inherent risk?