52442 research outputs found
Sort by
Migrationsbedingte Mehrsprachigkeit im Französischunterricht: Die Professionalisierung angehender Fremdsprachenlehrkräfte im Spiegel des universitären Ausbildungsangebots
No full textThe acquisition of motion event constructions by German-speaking learners of Italian as L3: The role of input frequency distributions, the L1 and the L2(s)
No full textEssays in causal inference
No full textDissertation for the doctoral degree in Economics at the University of Mannheim. Three chapters on causal inference
Auctions vs. negotiations : the role of communication in an experiment with procurement managers
No full textWe investigate how buyer-supplier communication affects procurement prices, comparing auctions without direct communication to negotiations allowing it. In controlled experiments involving students and procurement professionals, we find communication increases prices, disadvantaging buyers. Negotiation analyses show lower initial offers, negotiation-focused dialogue, and emphasizing competition help reduce prices. Contrary to conventional wisdom, auctions without communication often yield better procurement outcomes, especially in competitive markets. Our results suggest managers should reconsider assumptions about experienced negotiators achieving superior deals and instead favor procurement auctions with limited communication to secure lower prices
Congestion management games in electricity markets
No full textThis paper proposes a game-theoretic model to analyze the strategic behavior of inc-dec gaming in market-based congestion management (redispatch). We extend existing models by considering incomplete information about competitors’ costs and a finite set of providers. We find that inc-dec gaming is also a rational behavior in markets with high competition and with uncertainty about network constraints. Such behavior already occurs in our setup of two regions. Comparing market-based redispatch with three theoretical benchmarks highlights a lower efficiency level of market-based redispatch and inflated redispatch payments. Finally, we study seven variations of our basic model to assess whether different market fundamentals or market design changes mitigate incdec gaming. None of these variations eliminate inc-dec gaming entirely
New frontiers in research on industrial decarbonization
No full textSubstantial advances toward global decarbonization have been made in areas such as electricity generation and the electrification of building heat and road transport, yet the decarbonization of energy-intensive industries remains a formidable but crucial challenge. Decarbonization of the industrial sector, whose direct emissions account for about 25% of global carbon dioxide, is essential for transitioning the world economy toward a sustainable growth path. With present technologies and policies, such decarbonization appears technically possible, but difficult and costly. Here, we highlight the pressing need for new lines of research on two emerging frontiers. The first quantifies how industrial decarbonization technologies and policies interact with the broader economy. The second builds on growing data availability and policy experience with industrial decarbonization to provide broad-scale ex post quantifications of its impacts as an essential empirical complement to a largely modeling-based literature to date
Inside the firm : evidence from survey experiments on the incidence of business taxes, price setting, and tax preferences
No full textThis dissertation investigates how firms respond to taxes, inflation, and fiscal policy communication using randomized survey experiments with firms. The first study analyzes how firms adjust wages, prices, investment, and profit distributions when facing hypothetical profit tax changes, revealing asymmetric incidence. The second study examines whether central bank inflation forecasts influence price-setting during the 2022 inflation surge. Firms shown official forecasts plan smaller price increases, particularly those with high prior expectations. The third study explores how narratives about fiscal policy shape tax preferences. Framing tax increases as fiscally responsible raises support for higher taxes, whereas redistribution-focused narratives have weaker effects. Together, the findings show how expectations and communication can shape firms’ economic behavior and attitudes
Static, dynamic, or human? The role of slide dynamics and instructor cues in video lectures
No full textThe present study investigated the interplay of cognitive cues and social cues in instructional videos on students’ knowledge acquisition and sense of social presence. 312 preservice teachers took part in the study. Out of these, 238 participants were randomly assigned to one of three experimental groups receiving an asynchronous online video lecture on three research methods topics, featuring either static slides with voiceover (minimal signaling), dynamic slides with voiceover (moderate signaling), or dynamic slides with additional instructor signaling (maximum signaling). 74 participants served as a control group and completed pre- and posttests without attending the course. Perceived difficulty, invested effort, motivation, and notetaking were included as covariates. Dynamic slides did not improve knowledge acquisition compared to static slides. However, instructor signaling enhanced knowledge acquisition when perceived difficulty was high. Furthermore, instructor signaling significantly increased perceptions of social presence for two of the three investigated topics, highlighting the importance of social cues