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61.
62.
Aldo Rustichini John Dickhaut Paolo Ghirardato Kip Smith Jos V. Pardo 《Games and Economic Behavior》2005,52(2):257
We study the behavior of subjects facing choices between certain, risky, and ambiguous lotteries. Subjects' choices are consistent with the economic theories modeling ambiguity aversion. Our results support the conjecture that subjects face choice tasks as an estimation of the value of the lotteries, and that the difficulty of the choice is an important explanatory variable (in addition to risk and ambiguity aversion).The brain imaging data suggest that such estimation is of an approximate nature when the choices involve ambiguous and risky lotteries, as the regions in the brain that are activated are typically located in parietal lobes. Thus such choices require mental faculties that are shared by all mammals, and in particular are independent of language. In contrast, choices involving partial ambiguous lotteries additionally produce an activation of the frontal region, which indicates a different, more sophisticated cognitive process. 相似文献
63.
Aldo Spanjer 《能源经济杂志》2008,32(1):46-51
Stimulating investments whilst introducing competition is a major policy issue for European gas markets. The current Article
22 exemptions regime, which is an application to the gas market of the access holiday theory, is designed to address this
issue. Though useful, the access holiday theory provides an incomplete picture. In order to adequately analyze the exemptions
regime, this paper incorporates the real options theory of investments into the analysis. Combining both theories provides
the properties of an exemptions regime that better stimulates investments in gas. The current exemptions regime has some shortcomings,
in particular regarding its risk criterion. A better exemptions regime would grant less exemptions, but if it does, allows
higher profits during the exemption.
Revised version of a paper presented at the European Doctoral Seminar on Natural Gas, State University, Moscow, November 24,
2007. I would like to thank the participants, especially Martin Gilman and Franz Hubert, as well as Koen Caminada, Ben van
Velthoven and a referee of this journal for their comments and suggestions. 相似文献
64.
Anne Hanley presents a lucid and impressive narrative of theevolution of financial markets in São Paulo, Brazil.She traces the evolution of the banking sector and SãoPaulo stock exchange from the end of the Empire (Brazil wasan empire with a constitutional monarchy between 1822 and 1889)through the first three decades of the Republic (18891920)and the contemporaneous evolution of capital markets from theirearly "personalistic" stage to "maturity" in the early twentieth 相似文献
65.
During the last quarter of the 20th Century, the conventionalwisdom prevailing in academic, political and financial circleswas definitely against government deficits. At the turn of thecentury, however, a substantial recourse to deficit spendingpractices in the United States reopened the debate on the usefulnessof countercyclical fiscal policies. This essay discusses themain contents of this debate, reviewing the contributions tovarious symposiums held at a number of U.S. Federal ReserveBanks. A comparison with the views on this issue prevailingin Europe is also provided. 相似文献
66.
The spatial economy is analyzed in the general equilibrium framework by considering the production and the utility functions depending on spatial distribution and sets. The geometric constraint between the location and the extension of goods supplies the equilibrium condition for space. The existence of an equilibrium is demonstrated by extending the Gale-Nikaido theorem to the case under examination. Consequently, the competetive equilibrium exists, under the assumptions of the theorem, although each point of space is heterogeneous with any other point (because of the different location): the existence is allowed by the perfect partibility of space. 相似文献
67.
Hans Weigand Mareike Schoop Aldo de Moor Frank Dignum 《Group Decision and Negotiation》2003,12(1):3-29
Negotiation support is an important challenge for business-to-business e-commerce that is still poorly supported in current information systems. One reason is that negotiation processes are much harder to formalize than the business processes in the fulfilment phase. The goal of this paper is to provide the basis for a formal analysis of different types of electronic negotiations which can help developers of future negotiation support systems. The analysis is performed from a communication perspective, in particular, Habermas' theory of communicative action. Using this perspective, a distinction can be made between norm-oriented, goal-oriented and document-based negotiation. Whereas traditional modeling methods take a data-oriented view, the theory of communicative action supports a communication-oriented view that provides more insight in the logic of negotiation processes. The analysis forms the basis for the negotiation support prototype implemented within the ESPRIT project MeMo (Mediating and Monitoring Electronic Commerce) which was aimed at B2B e-commerce for SMEs in Europe. 相似文献