1,721,058 research outputs found
Fehlentscheidung aus dem Bauch heraus - Der Brexit als Lehrstück über die die Tücken von Volksentscheiden - Campusreport am 01.01.2019
No full textFür die Briten war das abgelaufene Jahr 2018 überschattet durch den Streit um den Brexit. Die anhaltende Unsicherheit über die Zukunft Großbritanniens kostet Arbeitsplätze, Investitionen werden aufgeschoben, das britische Pfund ist unter Druck. Inzwischen mehren sich Stimmen, die ein zweites Referendum über den Austritt des Landes aus der EU fordern. Aber das Land ist nach wie vor zutiefst gespalten in erbitterte EU-Gegner und verärgerte EU-Anhänger. Für den Wirtschaftswissenschaftler Clemens Puppe vom Karlsruher Institut für Technologie ist das Gezerre um den Brexit ein Lehrstück über die Tücken von Volksentscheiden
Essays on Individual and Collective Decision Making
Get PDFDie Dissertation widmet sich vier Themen zu individuellen und kollektiven Entscheidungen. Erstens wird ein Modell von Entscheidern entwickelt, die Pläne schmieden, um Selbst-Kontrolle über zukünftige Entscheidungen auszuüben und dadurch erwarteten Verhaltens- oder Präferenzänderungen entgegenwirken. Zweitens präsentiert die Arbeit einen ersten Ansatz zur Reformulierung des auf Arrow (1951) zurückgehenden Grundproblems der unabhängigen und nicht-diktatorischen Aggregation individueller Entscheidungen zu einer Sozialwahlfunktion unter allgemeineren Rationalitätsannahmen. Drittens wird untersucht, wann Rechte, die an verschiedene am Aggregationsprozess beteiligte Gruppen vergeben werden, insofern widerspruchsfrei sind, dass eine Aggregationsmethode existiert, die mit jedweder Ausübung dieser Rechte konsistent ist. Und viertens vergleicht die Arbeit die epistemischen Eigenschaften zweier gängiger Aggregationsmethoden, dem Prämissen-basierten und dem Konklusions-basierten Ansatz, im allgemeineren Kontext der Judgment Aggregation mit korrelierten Wählern
Surftipp, Feuer und Flamme für Puppe, beehoover im Studio : Beitrag des Studierendenmagazins "Extrahertz" bei RTV am 25.03.2006
No full textThree Essays in Empirical Microeconomics
No full textThis dissertation consists of three studies that apply diverse methodological approaches, including cross-national survey data, social media content analysis, and an online experiment, to explore individual behavior within the field of empirical microeconomics.
The first two studies are motivated by the global shock of COVID-19 pandemic, which triggered disruption in many aspects of life due to public health responses such as lockdowns. While prior research has examined pandemic-induced behavioral changes, much of it relied on single-country datasets, limiting the ability to generalize findings or assess how specific lockdown characteristics influence changes in behavior. The first two studies address this gap by employing cross-national data to provide a more comprehensive analysis of the impact of lockdown measures on the changes in daily habits. The first study investigates changes in hygiene habits – specifically, face mask usage and daily handwashing frequency – and people’s long-term beliefs about the persistence of these changes after the pandemic. Using a representative survey across eight countries, together with Twitter and Google Trends analysis, it finds that both behaviors increased significantly during lockdowns. Long-term beliefs about these habits are sticky and do not fall back to the level before the pandemic. The results reveal that stricter lockdown leads to stronger responses. Lockdown lengths also contribute to an improvement in hygiene practices, but too long lockdown might backfire. Drawing on the same survey dataset, the second study focuses on the shifts in digital habits such as online streaming, remote work, online studying and digital gaming. The results show that both lockdown stringency and lockdown lengths are positively associated with changes in digital activities, however, the effect of lockdown lengths are not linear.
The third study departs from the pandemic context to explore a broader trend that it accelerated: the growing reliance on digital channels for financial advice. As in-person financial counselling declined during the pandemic, individuals increasingly turn to virtual sources for investment advice. This shift raises questions about the quality and consequences of online peer advice. To investigate this, the third study uses an online experiment to assess the impact of online advice, sourced from Reddit, on an investment task. The findings reveal that advice leads to improved investment quality. Moreover, individuals are more likely to choose advisors with high past returns, even when doing so involves increased risk exposure. Individuals who could choose an advisor valued their portfolio more highly compared to those who made decisions by themselves, suggesting that access to advice can enhance both objective and perceived investment outcomes.
Overall, these studies contribute to our understanding of how exogenous shocks and emerging digital environments reshape behavior. By integrating survey research, social media analysis, and experimental methods, the dissertation demonstrates the methodological breadth and practical relevance of empirical microeconomics, offering insights for policy design and digital governance
Karlsruher Wirtschaftsprofessor plädiert gegen einseitig effizienzorientierte Auffassung der Ökonomie : auch die Herstellung von Chancengleichheit sollte Aufgabe einer nachhaltig verstandenen Wirtschaft sein
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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