Helmut Max Dietl, Egon Franck, Erfolgreiches Geschäftsmodell des FC Barcelona, In: Neue Zürcher Zeitung, 142, p. 62, 22 June 2007. (Newspaper Article)
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Enrico De Giorgi, Evolutionary Portfolio Selection With Liquidity Shocks , In: Annual Conference of the Society for the Advancement of Economic Theory, Kos, Greece, June 21, 2007. . 2007. (Conference Presentation)
The wealth dynamics of insurance companies strongly depends on the success of their investment strategies, but also on liquidity shocks which occur during unfavorable years, when indemnities to be paid to the clients exceed collected premia. An investment strategy that does not take liquidity shocks into account, exposes insurance companies to the risk of bankruptcy.
This paper analyzes the behavior of insurance companies in an evolutionary framework. We show that an insurance company that merely satisfies regulatory constraints will eventually vanish from the market. We give a more restrictive no-bankruptcy condition for the investment strategies and we characterize trading strategies that are evolutionary stable, i.e., able to drive out any mutation. We study the existence of such strategies and the conditions under which financial and insurance markets are stable. |
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Jürg Syz, Presenting the First European Property Derivatives Trades, In: Marcus Evans Conference on Discovering the Pan-European Property Derivatives Market. 2007. (Conference Presentation)
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David Seidl, A Note on the Concept of Relevance, In: Organization Studies Summer Workshop. 2007. (Conference Presentation)
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T Kuhn, AceRules: executing rules in controlled natural language, In: First International Conference on Web Reasoning and Rule Systems 2007, Springer, Heidelberg, 2007-06-07. (Conference or Workshop Paper published in Proceedings)
Expressing rules in controlled natural language can bring us closer to the vision of the Semantic Web since rules can be written in the notation of the application domain and are understandable by anybody. AceRules is a prototype of a rule system with a multi-semantics architecture. It demonstrates the formal representation of rules using the controlled natural language ACE. We show that a rule language can be executable and easily understandable at the same time. AceRules is available via a web service and two web interfaces. |
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Felix-Robinson Aschoff, Marco Prestipino, Gerhard Schwabe, Cooperation technology and timeliness of information: Comparing travelbooks, wikis and online communities, In: 15th European Conference on Information Systems (ECIS), Proceedings of the 15th European Conference on Information Systems (ECIS), 2007-06-07. (Conference or Workshop Paper published in Proceedings)
Based on an information systems metaphor for virtual communities this paper discusses up-todateness as one crucial factor of travel information quality. Two empirical studies are presented which show that the up-to-dateness of information in travelbooks, wikis and in forum communities does not differ systematically. Based on this empirical evidence we focus on understanding the factors influencing the up-to-dateness of the three media. We propose a framework with three determining factors: 1) the initial up-to-dateness at the time the information is first available for the user 2) the information volatility in a certain domain and 3) the length of the revision cycles. From these factors we hypothesize a) that the initial up-to-dateness is best in travelbooks and worst in forums and b) that the revision cycle is shortest in forums and longest in travelbooks. Since wikis come close the initial up-to-dateness of travelbooks and its revision cycle is almost as short as in forums, we finally argue why we believe wikis to be the most up-to-date medium in the long run. |
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K Kaljurand, N E Fuchs, Verbalizing OWL in Attempto controlled English, In: Proceedings of OWL: Experiences and Directions (OWLED 2007), 2007-06-06. (Conference or Workshop Paper published in Proceedings)
We describe a verbalization of the logical content of OWL
ontologies — using OWL 1.1 without data-valued properties — in Attempto Controlled English (ACE). Because ACE is a subset of English,
the verbalization makes OWL ontologies accessible to people with no
training in formal methods. We conclude that OWL can be verbalized
in concise and understandable English provided that a certain naming
style is adopted for OWL individuals, classes, and properties. |
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Cristian Morariu, Burkhard Stiller, A Distributed Architecture for IP Traffic Analysis, In: 1st international conference on Autonomous Infrastructure, Management and Security: Inter-Domain Management (AIMS), Springer, 2007-06-06. (Conference or Workshop Paper published in Proceedings)
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Peer-to-Peer Large-scale Collaborative Storage Networks, In: AIMS 2007 / Autonomous Infrastructure, Management and Security, Oslo, Norway, 2007. (Conference or Workshop Paper published in Proceedings)
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N E Fuchs, R Schwitter, Web-annotations for humans and machines, In: 4th European Semantic Web Conference (ESWC 2007), 2007-06-03. (Conference or Workshop Paper published in Proceedings)
We propose to manually annotate web pages with computer-processable controlled natural language. These annotations have well-defined
formal properties and can be used as query relevant summaries to automatically
answer questions expressed in controlled natural language, and as the basis for
other forms of automated reasoning. Last, but not least, the annotations can also
serve as human-readable summaries of the contents of the web pages. Arguably, annotations written in controlled natural language can bridge the gap between informal and formal notations and leverage true collaboration between
humans and machines. This is a position paper that proposes a solution combining existing methods and techniques to achieve a highly relevant practical goal,
namely how to effectively access information on the web. However, our solution introduces a "chicken and egg" problem: a critical mass of web annotations
will be necessary that people perceive the value of these annotations and start
annotating web pages themselves. Only the future will show whether this – basically non-technical – problem can be solved. |
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Markus Bürgi, Der Einfluss von Basel II auf den Schweizer Sekuritisierungs-Markt, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Stefano Battiston, D Delli Gatti, M Gallegati, B Greenwald, J E Stiglitz, Credit chains and bankruptcy propagation in production networks, Journal of Economic Dynamics and Control, Vol. 31 (6), 2007. (Journal Article)
We present a simple model of a production network in which firms are linked by supplier–customer relationships involving extension of trade–credit. Our aim is to identify the minimal set of mechanisms which reproduce qualitatively the main stylized facts of industrial demography, such as firms’ size distribution, and, at the same time, the correlation, over time and across firms, of output, growth and bankruptcies. The behavior of aggregate variables can be traced back to the direct firm–firm interdependence. In this paper, we assume that the number of firms is constant and the network has a periodic static structure. But the framework allows further extensions to investigate which network structures are more robust against domino effects and, if the network is let to evolve in time, which structures emerge spontaneously, depending on the individual strategies for orders and delivery. |
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D V Black, M Gopi, F Kuester, F Wessel, Renato Pajarola, Visualizing flat spacetime: viewing optical versus special relativistic effects, American Journal of Physics, Vol. 75 (6), 2007. (Journal Article)
A visual representation of Minkowski spacetime appropriate for a student with a background in geometry and algebra is presented. Minkowski spacetime can be modeled with a Euclidean four-space to yield accurate visualizations as predicted by special relativity. The contributions of relativistic aberration as compared to classical prerelativistic aberration to the geometry are
discussed in the context of its visual representation. |
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Uschi Backes-Gellner, A Werner, Entrepreneurial Signaling via Education: A Success Factor for Innovative Start-Ups, Small Business Economics, Vol. 29 (1-2), 2007. (Journal Article)
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Helmut Max Dietl, Egon Franck, T Hasan, Zur Eignung der Ligagenossenschaft als Organisationsform im professionellen Teamsport: eine modelltheoretische Untersuchung, Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung, Vol. 59, 2007. (Journal Article)
Eine augenscheinliche Gemeinsamkeit aller vier amerikanischen Major Leagues besteht darin, dass sie als Genossenschaften der Clubs organisiert sind. Im letzten Jahrzehnt konnten die Clubs der großen nationalen Fußballligen Europas ihre Autonomie gegenüber den Fußballverbänden erheblich stärken. Offenbar nutzen die Clubs die gewonnene Freiheit, um in Bezug auf die Ligaorganisation vergleichbare Entscheidungen zu fällen wie die Clubs in den nordamerikanischen Major Leagues, die seit jeher außerhalb von Verbandsstrukturen operieren. Das Hauptziel dieses Aufsatzes besteht darin zu erklären, warum die Genossenschaftsstruktur eine effiziente Organisationsform der Ligaaktivitäten ist. Wir zeigen mit Hilfe eines formalen Modells, worin der ökonomische Vorteil dieser hybriden gegenüber marktlichen Organisationsformen der Ligaaktivitäten bestehen könnte. |
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Bruno Frey, Christine Benesch, Alois Stutzer, Does watching TV make us happy?, Journal of Economic Psychology, Vol. 28 (3), 2007. (Journal Article)
Watching TV is a major human activity. Because of its immediate benefits at negligible immediate marginal costs it is for many people tempting to view TV rather than to pursue more engaging activities. As a consequence, individuals with incomplete control over, and foresight into, their own behavior watch more TV than they consider optimal for themselves and their well-being is lower than what could be achieved. We find that heavy TV viewers, and in particular those with significant opportunity cost of time, report lower life satisfaction. Long TV hours are also linked to higher material aspirations and anxiety. |
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A Muller, How to make the clean development mechanism sustainable — The potential of rent extraction, Energy Policy, Vol. 35 (6), 2007. (Journal Article)
The clean development mechanism (CDM) should foster sustainable development and greenhouse gas emission reductions. The design of the CDM and first experience suggest that it may not achieve these goals. Developing countries hosting CDM projects may lose cheap emission reduction possibilities for their own future use, and sustainable development and technology transfer may not take place. On the other hand, the CDM has the potential to generate considerable rents if permit prices are high or costs low. To account for equity and distributional issues, a deliberate decision on how to distribute these rents could be taken and the potential failure of the CDM in meeting its goals calls for some further regulation. I suggest to combine these two issues and to extract the rents by a profit tax. Ideally, the tax revenues could contribute to national sustainable development strategies, to offset external costs imposed by CDM projects and to extract part of the resource rent they may generate. The international character of the CDM could offer a frame for internationally coordinated tax design. This would hedge against a potential race to the bottom. |
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Bruno Frey, Dominic Rohner, Protecting cultural monuments against terrorism, Defence and Peace Economics, Vol. 18 (3), 2007. (Journal Article)
Famous cultural monuments are often regarded as unique icons, making them an attractive target for terrorists. Despite huge military and police outlays, terrorist attacks on important monuments can hardly be avoided. We argue that an effective strategy for discouraging terrorist attacks on iconic monuments is for the government to show a firm commitment to swift reconstruction. Using a simple game-theoretic model, we demonstrate how a credible claim to rebuild any cultural monuments destroyed discourages terrorist attacks by altering the terrorists’ expectations and by increasing the government’s reputation costs if they fail to rebuild. |
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Pavlo R Blavatskyy, Stochastic expected utility theory, Journal of Risk and Uncertainty, Vol. 34 (3), 2007. (Journal Article)
A new decision theory is proposed to explain the violations of expected utility theory through the role of random errors. The main premise of the new theory is that individuals make random errors when they compute the expected utility of a risky lottery. When being distorted by error, the expected utility of a lottery should neither exceed the utility of the highest possible outcome nor fall below the utility of the lowest possible outcome. This crucial assumption implies that the expected utility of a lottery is likely to be overvalued (undervalued) by random errors, when it is close to the utility of the lowest (highest) possible outcome. The new theory explains many stylized empirical facts such as the fourfold pattern of risk attitudes, the common consequence effect (Allais paradox), the common ratio effect and violations of betweenness. The model fits the data from ten well-known experimental studies at least as well as cumulative prospect theory. |
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Gerold Schneider, Kaarel Kaljurand, Fabio Rinaldi, Tobias Kuhn, Pro3Gres Parser in the CoNLL Domain Adaptation Shared Task, In: Proc. of the ACL Conference, Workshop on Computational Natural Language Learning (CoNLL-XI) Shared Task, Prague, June 2007. (Conference or Workshop Paper)
We present Pro3Gres, a deep-syntactic, fast
dependency parser that combines a handwritten
competence grammar with probabilistic
performance disambiguation and that
has been used in the biomedical domain. We
discuss its performance in the domain adaptation
open submission. We achieve average
results, which is partly due to difficulties
in mapping to the dependency representation
used for the shared task. |
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