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  • Artikel  (11)
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  • Artikel: DFG Deutsche Nationallizenzen  (11)
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Annals of operations research 2 (1984), S. 29-37 
    ISSN: 1572-9338
    Schlagwort(e): Business ; forecasts ; economics ; alternatives ; executives
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Annals of operations research 2 (1984), S. 285-316 
    ISSN: 1572-9338
    Schlagwort(e): Regulation ; shadow price ; economics ; markets ; natural gas
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Notizen: Abstract Inclusion of the shadow prices for natural gas in a dynamic fuels model for the United States shows that the primary reason for the relatively large, fly-up in new marginal gas prices in the early 1980's was the release of the pent-up price effects of the U.S. government's price regulations. In accordance with principles, the shadow price of natural gas fell siginificantly following de-regulation of the highcost gas (section 107) in 1980, which represented the precursor for downward adjustments in marginal wellhead prices of new high-cost gas and drilling activity. The modeling results show that no significant fly-up in new marginal gas prices for lower-cost gas (section 102) is likely to occur in 1985, when its phased de-regulation ends and it is finally de-regulated, because no shadow price precursor currently exists for this gas. Shadow price principles clear up the primary misconceptions with regard to natural gas pricing. This application indicates the significance of shadow price principles for regulated pricing in general.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Annals of operations research 2 (1984), S. 329-334 
    ISSN: 1572-9338
    Schlagwort(e): nation ; technology ; economics ; environment ; tradeoff's ; policy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Notizen: Abstract Analysis of pending national policy takes on greater importance each day to supply policy makers with much needed data on the overall economic effect such policies will have on total employment, income, output, tax revenues, and the general price level throughout the economy. This short paper examines the potential for integration of existing modeling technology into a meaningful national planning model to provide a sound set of economic indices leading to enhanced market efficiency and resource use. Initial efforts at integrated modeling and analysis are described, together with indications of their levels of success in replicating the existing economic environment. Emphasis is placed on determination of shadow prices in a growing economy and their incorporation into the systematic development of a national planning model.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Annals of operations research 2 (1984), S. 271-284 
    ISSN: 1572-9338
    Schlagwort(e): Search ; uncertainty ; economics ; exploration ; minerals
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Notizen: Abstract A sequential method of modeling the increase in precision of expected net revenues for a proposed exploration and exploitation program has been developed. Embedded within a computer simulation model of the exploration process, which incorporates a method of learning about deposit characteristics, is a multi-stage stochastic optimization process model to determine the optimal exploitation pattern of the deposit. This approach stresses the interdependence of the planning of the exploration and exploitation processes. The model can be used to determine the amount of exploration which should be undertaken in an area by more precisely predicting the long-range profitability associated with the amount of exploration. Thus, decision makers are provided a capability which reduces the uncertainty in profitability outcomes over future production periods.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Journal of risk and uncertainty 2 (1989), S. 5-35 
    ISSN: 1573-0476
    Schlagwort(e): Ambiguity ; expected utility ; insurance ; risk ; subjective probability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Notizen: Abstract In a series of experiments, economically sophisticated subjects, including professional actuaries, priced insurance both as consumers and as firms under conditions of ambiguity. Findings support implications of the Einhorn-Hogarth ambiguity model: (1) For low probability-of-loss events, prices of both consumers and firms indicated aversion to ambiguity; (2) As probabilities of losses increased, aversion to ambiguity decreased, with consumers exhibiting ambiguity preference for high probability-of-loss events; and (3) Firms showed greater aversion to ambiguity than consumers. The results are shown to be incompatible with traditional economic analysis of insurance markets and are discussed with respect to the effects of ambiguity on the supply and demand for insurance.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Journal of risk and uncertainty 2 (1989), S. 235-263 
    ISSN: 1573-0476
    Schlagwort(e): risk ; expected utility ; irrationality ; prospect theory
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Notizen: Abstract This article develops a variant of the expected utility model termed prospective reference theory. Although the standard model occurs as a limiting case, the general approach is that individuals treat stated experimental probabilities as imperfect information. This model is applied to a wide variety of aberrant phenomena, including the Allais paradox, the overweighting of low-probability events, the existence of premiums for certain elimination of risks, and the representativeness heuristic. The prospective reference theory model predicts most of the observed behavioral patterns rather than being potentially reconcilable with such phenomena.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Computational economics 1 (1988), S. 113-135 
    ISSN: 1572-9974
    Schlagwort(e): Expert systems ; economics ; auction bidding markets ; artificial intelligence ; economic modelling
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik , Wirtschaftswissenschaften
    Notizen: Abstract In this paper we argue that expert systems can be powerful tools for modelling microeconomic systems, including both individual decision making and the coordination of individual agents in a resource allocation mechanism. Using the fact that expert systems are essentially computerized versions of decision processes, we illustrate how they can be viewed as generalized process models of decision-making. We argue that the expert system approach is beneficial because it allows a policy analyst to explore the implication of policy alternatives without having to incur the generally prohibitive cost of field implementation studies. Further, enables the incorporation and updating of decision strategies and qualitative information, which human experts typically use but which is not amenable to pure mathematical modelling. One particular microeconomic system we suggest could be modelled as an expert system is the OCS offshore oil lease auction process. Moreover, we argue that constructing such an expert system model would require the development of two integrated expert systems: one for the auction process and subsequent resource allocation and the other to model the individual bidding behavior of the auction participants. We set out the structure of the auction expert system in some detail and discuss rules of thumb used by bidders inferred from our empirical research on past OCS auctions. Such an expert system of an auction leasing process could provide benefits to both bidders (e.g., oil companies) and the auctioneer (e.g., the Department of the Interior) as well. Bidders, by trying different strategies against different hypothesized strategies by their opponents could use such an integrated expert system to improve their bidding performances. The auctioneer, on the other hand, could test the efficiency of various proposed auction institutions under different assumptions about bidding behavior. In some circumstances, it might be desirable to even automate the auction process with a network coordinating the expert systems used by the individual firms and a computerized auctioneer.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Computational economics 2 (1989), S. 83-99 
    ISSN: 1572-9974
    Schlagwort(e): Modeling system ; model implementation ; knowledge based system ; error detection ; economics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik , Wirtschaftswissenschaften
    Notizen: Abstract The paper is concerned with the effectiveness of economic modeling. It argues that the key problems of economic modeling are the time and effort it takes to implement a model, the problems of detecting and correcting errors, and the difficulties involved in communicating assumptions. The logical consequence is to improve the model representation and the error detection capabilities of modeling systems. The paper discusses information content and error detection in models that use conventional mathematical notation and argues that we need a model representation with more information than is usually available in mathematical representations. HERCULES, a modeling systems for large economywide static models is then presented. The system uses a model representation in which all economic assumptions are directly available. This makes model implementation much faster and prevents certain types of errors. In other cases, error detection and error messages are far superior to those of general purpose mathematical modeling systems. The technical implementation of HERCULES, designed to allow maximum flexibility for future enhancements is discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Theory and decision 27 (1989), S. 93-106 
    ISSN: 1573-7187
    Schlagwort(e): cognition ; decision ; graphs ; artificial intelligence ; risk ; uncertainty ; expert systems ; expected utility
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Abstract In the first part, we try to give a representation of the process by which man endeavours to grasp uncertainty. We propose a backward exploration which we will modelize through an influence diagram and then we can draw a few conclusions from that representation for the axiomatics of Decision. In the second part, we deal with the processing of the information formatted in such a way, regarding both its temporal complexity and its elective complexity. The first part as the second one dealing with representation and the consequences for information processing of uncertainty cognition lead to a severe criticism of the expected utility hypothesis. To conclude, we suggest a few remarks on expert systems of decision aid under uncertainty.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Theory and decision 24 (1988), S. 169-200 
    ISSN: 1573-7187
    Schlagwort(e): decision theory ; risk ; expected utility ; security level ; risk aversion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Abstract The particular attention paid by decision makers to the security level ensured by each decision under risk, which is responsible for the certainty effect, can be taken into account by weakening the independence and continuity axioms of expected utility theory. In the resulting model, preferences depend on: (i) the security level, (ii) the expected utility, offered by each decision. Choices are partially determined by security level comparison and completed by the maximization of a function, which express the existing tradeoffs between expected utility and security level, and is, at a given security level, an affine function of the expected utility. In the model, risk neutrality at a given security level implies risk aversion.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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