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121.
Ulrich Oberndorfer 《Ecological Economics》2009,68(4):1116-1126
This paper constitutes - to our best knowledge - the first econometric analysis on stock market effects of the EU Emission Trading Scheme (EU ETS). Our results suggest that EU Emission Allowance (EUA) price developments matter to the stock performance of electricity firms: EUA price changes and stock returns of the most important European electricity corporations are shown to be positively related. This effect does not work asymmetrically, so that stock markets do not seem to react differently to EUA appreciations in comparison to depreciations. The carbon market effect is shown to be both time- and country-specific: It is particularly strong for the period of EUA market shock in early 2006, and differs with respect to the countries where the electricity corporations analysed are headquartered. Stock market reactions to EUA volatility could not be shown. 相似文献
122.
Die Renten aus der Gesetzlichen Rentenversicherung werden aufgrund der demografischen Entwicklung sowohl für M?nner als auch
für Frauen relativ zu den Erwerbseinkommen sinken. Frauen sind dabei zus?tzlich spezifischen Rentenrisiken ausgesetzt. Um
die Unterschiede zukünftig auszugleichen, helfen insbesondere Ma?nahmen, die die Vereinbarkeit von Familie und Beruf verbessern. 相似文献
123.
We critically assess integrative social contracts theory (ISCT) and show that the concept particularly lacks of moral justification of substantive hypernorms. By drawing on Habermasian philosophy, in particular discourse ethics and its recent application in the theory of deliberative democracy, we further advance ISCT and show that social contracting in business ethics requires a well-justified procedural rather than a substantive focus for managing stakeholder relations. We also replace the monological concept of hypothetical thought experiments in ISCT by a concept of practical discourse to better govern business activities on the macro-level of organizational actors such as firms, governments, and NGOs. 相似文献
124.
C. Robert Clark Ulrich Doraszelski Michaela Draganska 《Quantitative Marketing and Economics》2009,7(2):207-236
We use a panel data set that combines annual brand-level advertising expenditures for over three hundred brands with measures
of brand awareness and perceived quality from a large-scale consumer survey to study the effect of advertising. Advertising
is modeled as a dynamic investment in a brand’s stocks of awareness and perceived quality and we ask how such an investment
changes brand awareness and quality perceptions. Our panel data allow us to control for unobserved heterogeneity across brands
and to identify the effect of advertising from the time-series variation within brands. They also allow us to account for
the endogeneity of advertising through recently developed dynamic panel data estimation techniques. We find that advertising
has consistently a significant positive effect on brand awareness but no significant effect on perceived quality.
相似文献
Michaela Draganska (Corresponding author)Email: |
125.
Zusammenfassung
Die Weltagrarm?rkte waren im letzten Jahr von stark steigenden Preisen gepr?gt. Wird diese Entwicklung durch fundamentale
Faktoren gestützt oder handelt es sich um eine kurzfristige Erscheinung? Welche Rolle spielen dabei das Bev?lkerungswachstum
und die Steigerung der Pro-Kopf-Einkommen? Was geht auf die Nachfrage nach biogenen Kraftstoffen zurück? Diese Fragen werden
beispielhaft anhand des Weizenmarktes behandelt.
Prof. Dr. Bernhard Brümmer, 39, ist Inhaber des Lehrstuhls für Landwirtschaftliche Marktlehre am Department für Agrar?konomie
und Rurale Entwicklung der Universit?t G?ttingen; Prof. Dr. Dr. h.c. Ulrich Koester, 70, ist Emeritus des Lehrstuhls für Landwirtschaftliche
Marktlehre an der Universit?t Kiel; Prof. Dr. Jens-Peter Loy, 44, lehrt in der Abteilung Marktlehre des Instituts für Agrar?konomie
an der Universit?t Kiel und ist Inhaber des Lehrstuhls für Marktlehre an der CAU Kiel. 相似文献
126.
Ohne Zusammenfassung 相似文献
127.
Distributed Visual Language Environments for Cooperation and Learning: Applications and Intelligent Support 总被引:1,自引:0,他引:1
H. Ulrich Hoppe Katrin Gaßner Martin Muuml;hlenbrock Frank Tewissen 《Group Decision and Negotiation》2000,9(3):205-220
An increasing number of collaborative learning environments is based on shared workspace systems using two-dimensional graph-structured visual representations such as argumentation networks and concept maps. We propose an integrated framework that allows for flexibly specifying a wide range of visual languages and plugging in components for operational semantics, adequate feedback and intelligent support. The generic application CardBoard provides card-based user interaction and collaboration by means of different languages in shared workspaces. To enhance modifiability, the interfaces between the distributed heterogeneous system components, particularly between intelligent components and user interfaces, have been standardised. 相似文献
128.
Cristiano Bellavitis Dzidziso Samuel Kamuriwo Ulrich Hommel 《Journal of Small Business Management》2019,57(4):1328-1349
A venture capitalist (VC) needs to trade off benefits and costs when attempting to mitigate agency problems in their investor‐investee relationship. We argue that signals of ventures complement the VC's capacity to screen and conduct a due diligence during the preinvestment phase, but its attractiveness may diminish in institutional settings supporting greater transparency. Similarly, whereas a VC may opt for contractual covenants to curb potential opportunism by ventures in the postinvestment phase, this may only be effective in settings supportive of shareholder rights enforcement. Using an international sample of VC contracts, our study finds broad support for these conjectures. It delineates theoretical and practical implications for how investors can best deploy their capital in different institutional settings while nurturing their relationships with entrepreneurs. 相似文献
129.
Wirtschaftsdienst - Durch eine rasant wachsende Rechenleistung können immer mehr Tätigkeiten, die bislang dem Menschen vorbehalten schienen, mittels Maschinen und Algorithmen... 相似文献
130.
Ulrich Kohli 《Journal of public economics》1985,26(3):379-400
This paper presents a theory of public goods based on production theory where public goods are viewed as inputs to the production process. We examine the pure case of public inputs (no private inputs) as well as the mixed case (private and public inputs). We show how the case of public inputs is related to certain forms of nonjoint production, and we characterize it in terms of variable profit and joint cost functions. Comparative statics results are derived graphically in the two-by-two case. 相似文献