Ellsberg's (1961) famous paradox shows that decision-makers give events with âknownâ probabilities a higher weight in their outcome evaluation. In the same article, Ellsberg suggests a preference representation which has intuitive appeal but lacks an axiomatic foundation. Schmeidler (1989) and Gilboa (1987) provide an axiomatisation for expected utility with non-additive probabilities. This paper introduces E-capacities as a representation of beliefs which incorporates objective information about the probability of events. It can be shown that the Choquet integral of an E-capacity is (...) the Ellsberg representation. The paper further explores properties of this representation of beliefs and provides an axiomatisation for them. (shrink)
an overly long draft of an encyclopedia article forthcoming in History of Continental Thought, Volume 6: Poststructuralism and Critical Theory: The Return of Master Thinkers, ed. Alan D. Schrift (Acumen Press).
The WTO Dispute Settlement System (DSS) has been the object of many studies in politics, law, and economics focusing on institutional design problems. This paper contributes to such studies by accounting for the argumentative nature and sophisticated features of the DSS through a philosophical analysis of the procedures through which it is articulated. Jürgen Habermas's discourse theory is used as a hermeneutic device to disentangle the types of ‘orientations’ (compromise, consensus, and mutual understanding) pertaining to DSS procedures. We show (...) that these latter are oriented primarily to put the parties in a position to reach mutual understanding. Such an orientation is no mere idiosyncrasy of the DSS but is the only one consistently conducive to the WTO's general aims, in response to the various types of disputes that may arise between its Members. Before closing, we bring our procedural considerations to bear on the reform proposals of the DSS. (shrink)
This paper elaborates on discussions in Germany regarding some of the ethical and legal issues in the area of the use and patenting of inventions involving human tissue. The issues discussed pertain to the benefits and problems regarding informed consent and the issue of property rights as they relate to the donation of cells and tissue.
Over the past few years, the Virtual Organization (VO) paradigm has been emerging as an ideal solution to support collaboration among globally distributed entities (individuals and/or organizations). However, due to rapid technological and societal changes, there has also been an astonishing growth in technologies and services for mobile users. This has opened up new collaborative scenarios where the same participant can access the VO from different locations and mobility becomes a key issue for users and services. The nomadicity and mobility (...) introduces additional challenges for managing collaboration in VO environments. This paper focuses on the Identity Management challenge in a Mobile Dynamic VO environment, which is a VO that takes into account nomadicity and seamless mobility aspects as elaborated within the EU funded project Akogrimo (Access to Knowledge through the Grid in a mobile world). The resulting work is the design of the Akogrimo Identity Management system supporting the authentication and authorization process across the different administrative domains of the Mobile Dynamic VO. This design follows the service oriented approach and integrates the different perspectives: that of the network, that of the user and that of the service provider. Such an integration requires facing challenges; both from the architectural and technological viewpoints because different ‘worlds’ (i.e. network and service level) leverage different (and sometimes conflicting) approaches when addressing Identity Management. (shrink)
Choquet expected utility substitutes capacities for subjective probabilities to explain uncertainty aversion and related phenomena. This paper studies capacities as models of belief. The notions of inner and outer acceptance context are defined. These are shown to be the natural acceptance contexts when belief expansion is described by naÃ¯ve Bayesian and DempsterâShafer updating of capacities respectively. We also show that Eichberger and Kelsey's (1999b) use of DempsterâShafer updating as a model of belief revision may lead to violations of the (...) AGM axioms for rational belief change. (shrink)
Data from further human experiments touch four open questions in the target article. (1) Extinction of reward acquisition postulated by Depue & Collins's model could not be confirmed if correlating craving for, liking of, and satisfaction from smoking. (2) Intraindividual correspondence between responsivity to dopamine agonists and antagonists could likewise not be confirmed. (3) Nicotine craving and drug-induced hormone responses were not substantially correlated. (4) Low serotonin can be the cause and not just the moderator of dopaminergic sensitivity, and personality (...) correlates of low dopamine/low MAO (aggressive impulsive traits) can hardly be related to the positive emotion associated with dopaminergic activity. (shrink)
This paper compares different strategies of analysing economic phe-nomena, namely individualism and holism. As it turns out, a main point for which methodological individualism is criticized is its supposed reductionism and the related arbitrariness of choosing individuals as a unit of explanation. The paper shows that there exists at least with F. A. Hayek an author who presents an evolutionary theory of economic and social change that avoids the reductionism of orthodox individualistic theory. According to Hayek, the social scientist should (...) try to receive insights about collective phenomena by analysing to what extent rules of behaviour are adopted by some individuals, larger groups or a whole population. Besides the selection argument, Hayek's observation of learning processes as primary factors determining behaviour gives rise to a conception of mankind far beyond optimization models. Hayek thus overcomes a reductionist individualism by taking recourse to hierarchical selection and learning processes. (shrink)