Do you want to start a business, but you do not know how or where to begin? In this talk, Dr. Elina Hafer will show you how enaCom at the University of Bonn can support you from the very first idea all the way to implementation - whether it is a startup, a side business, an association, or a NGO. She willl also share insights from two of her own projects: a puzzle tour through Bonn that has already been founded and an alcohol-free wine alternative that is currently still in development. Come around!
Do you want to start a business, but you do not know how or where to begin? In this talk, Dr. Elina Hafer will show you how enaCom at the University of Bonn can support you from the very first idea all the way to implementation - whether it is a startup, a side business, an association, or a NGO. She willl also share insights from two of her own projects: a puzzle tour through Bonn that has already been founded and an alcohol-free wine alternative that is currently still in development. Come around!
We show that higher-order perturbation solutions to rational expectations models exhibit a certainty correspondence property: they can be obtained from the derivatives of the model’s perfect foresight solution. This extends the well-known certainty equivalence result beyond first order. For heterogeneous-agent models with large idiosyncratic state spaces, our approach is significantly faster than existing state-space perturbation or global solution methods. We apply our method to solve a HANK model and a menu cost model to third order in aggregate risk, quantifying the time variation in the fiscal multiplier and the responsiveness of inflation to costs, as well as the effect of perceived aggregate risk on the steady state and impulse responses.
This paper argues that a progressive tax system combined with individual taxation of married couples can generate more revenue than the current household-based U.S. system, especially when the extra revenues do not induce negative labor supply effects through increased government transfers. A progressive system that taxes individuals rather than couples jointly leads to larger labor force participation and higher average human capital, creates more “fiscal space”, Laffer curves shift up and social welfare potentially rises. In our model with one- and two-earner households, human capital and an extensive margin labor supply decision, the peak of the Laffer curve is 18 percentage points higher with an individual-based, progressive tax system than with the current U.S. tax system.
Can spatially neutral productivity improvements have spatially non-neutral consequences? Across three major sources of countrywide productivity growth, we document a consistent reallocation of economic activity toward port regions within countries. We rationalize these findings in a spatial model in which productivity growth increases export volumes, which in turn triggers a reduction in import costs through the round-trip effect (Wong, 2022), thus allowing port regions to attract economic activity. This prediction contrasts with standard model with exogenous trade costs in which spatially neutral productivity growth shifts economic activity toward interior regions that are more isolated from global markets. We calibrate our model and simulate it with and without the round-trip effect. Preliminary results suggest that the round-trip effect accounts for 15.6% of relative population growth in port regions and amplifies welfare gains from TFP growth by 24.1% in developing countries.
Ein Workshop zu Ambitions and challenges in data science and research data management findet am 6. Oktober 2026 (9:00–18:00 Uhr) im Wissenschaftszentrum Bonn statt. Die Veranstaltung bringt Forschende aus den Transdisziplinären Forschungsbereichen (TRAs) und darüber hinaus zusammen und soll den Austausch über Herausforderungen im Umgang mit Forschungsdaten fördern. Geplante Themen sind unter anderem: Forschungsdatenmanagement in großen Verbundprojekten und Exzellenzclustern Datenverarbeitung im Kontext von High-Performance Computing Herausforderungen und Perspektiven von Open Science Der Workshop knüpft an frühere TRA-Veranstaltungen wie TeRAbytes und TRAnsDigital an. Weitere Informationen, einschließlich der Keynote-Speaker, des Programms und der Anmeldemöglichkeiten, werden zu gegebener Zeit bekanntgegeben.
A workshop on ambitions and challenges in data science and research data management will take place on October 6, 2026 (9:00 a.m. – 6:00 p.m.) at the Wissenschaftszentrum Bonn. The event will bring together researchers from across the Transdisciplinary Research Areas (TRAs) and beyond, fostering exchange on key challenges in research data handling. Planned topics include: Research data management in large-scale projects and clusters of excellence Data handling in the context of high-performance computing Open science practices and related challenges The workshop continues a series of TRA events such as TeRAbytes and TRAnsDigital. Further details, including keynote speakers, the programme, and registration information, will be announced in due course.
Bereiten Sie sich auf den Studienbeginn vor: Der Mathevorkurs wiederholt zentrale mathematische Inhalte aus der Schulzeit, die für das Modul „Mathematik I“ von besonderer Bedeutung sind. In täglichen Vorlesungen sowie begleitenden Übungseinheiten unter Anleitung erfahrener Tutorinnen und Tutoren haben Sie die Möglichkeit, Ihre Kenntnisse gezielt aufzufrischen und eventuelle Wissenslücken zu schließen. Darüber hinaus bietet der Kurs die Gelegenheit, erste Kontakte zu Kommilitoninnen und Kommilitonen zu knüpfen und sich mit den örtlichen Gegebenheiten vertraut zu machen. Ein Kennenlernabend, organisiert durch die Fachschaft VWL, rundet das Angebot ab.
Prepare for the start of your studies: The Mathematics preliminary course reviews key mathematical concepts from school that are particularly important for the module “Mathematics I.” Through daily lectures and accompanying exercise sessions led by experienced tutors, you will have the opportunity to systematically refresh your knowledge and close any gaps. In addition, the course offers the chance to connect with fellow students and become familiar with the local environment. A welcome evening organized by the student association (Fachschaft VWL) completes the program.