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  • Articles  (15)
  • artificial intelligence  (9)
  • risk aversion  (6)
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  • Economics  (15)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of risk and uncertainty 2 (1989), S. 353-365 
    ISSN: 1573-0476
    Keywords: bargaining ; axiomatic models ; strategic models ; risk aversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract This article presents some new, intuitive derivations of several results in the bargaining literature. These new derivations clarify the relationships among these results and allow them to be understood in a unified way. These results concern the way in which the risk posture of the bargainers affects the outcome of bargaining as predicted by Nash's (axiomatic) solution of a static bargaining model (Nash, 1950) and by the subgame perfect equilibrium of the infinite horizon sequential bargaining game analyzed by Rubinstein (1982). The analogous, experimentally testable predictions for finite horizon sequential bargaining games are also presented.
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  • 2
    Electronic Resource
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    Springer
    Journal of risk and uncertainty 2 (1989), S. 219-234 
    ISSN: 1573-0476
    Keywords: risk aversion ; group decision ; syndicate ; risk sharing ; utility ; lotteries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract A group of risk-averse members must choose among monetary risks and payoff-sharing rules. Departure from the status quo requires unanimous consent. Such groups drill for oil, bail out nations, and make hostile takeover bids. Assume agreement on probabilities. As is well known, if all members have identically shaped HARA utility functions, efficient group act-choices follow another such function independently of payoff sharing. We show that all other groups inevitably have complex efficient behavior, accepting gambles among individually unacceptable lotteries in almost every status quo position. We also develop proper risk aversion for groups, and treat disagreement on probabilities.
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  • 3
    Electronic Resource
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    Springer
    Theory and decision 27 (1989), S. 93-106 
    ISSN: 1573-7187
    Keywords: cognition ; decision ; graphs ; artificial intelligence ; risk ; uncertainty ; expert systems ; expected utility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: 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.
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  • 4
    Electronic Resource
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    Springer
    Theory and decision 26 (1989), S. 37-46 
    ISSN: 1573-7187
    Keywords: endogenous risk ; risk aversion ; risk premium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: Abstract This note tries to correct a deficiency of the microeconomic literature on decision making under uncertainty. Indeed, when considering meaningful comparative statics results in situations where risks are at least partially controllable (endogenous), this literature has mostly relied upon the traditional Arrow-Pratt risk aversion functions and has paid very little attention to the definition of the risk premium. However when they defined the risk premium and the risk aversion functions, Arrow and Pratt considered only roulette gambles, i.e. risks totally exogenous to the individual. This note highlights the fact that several definitions of the risk premium may be proposed for endogenous risks. Two of them, already used in the literature, do not preserve the intuitively-appealing properties of the Arrow-Pratt risk premium. An alternative definition is then proposed. It is shown that this new definition of the risk premium applied to endogenous risks exhibits the properties generally admitted for roulette gambles.
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  • 5
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    Springer
    Annals of operations research 12 (1988), S. 337-357 
    ISSN: 1572-9338
    Keywords: Decision support systems ; logic programming ; prolog ; artificial intelligence ; computer capacity planning ; planning for resource acquisition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper describes a project to implement a decision support system for computer capacity planning. The system provides an intelligent interface to the various models needed for this type of planning by assisting the user in model formulation, data manipulation, model execution, interpretation and manipulation of results. The implementation strategy is based on the integration of relational model and database management with logic. A modified version of a Prolog interpreter is utilized as the vehicle for this integrated strategy.
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  • 6
    Electronic Resource
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    Annals of operations research 12 (1988), S. 109-134 
    ISSN: 1572-9338
    Keywords: Flexible manufacturing system ; production scheduling ; artificial intelligence ; predicate calculus ; state-operator framework ; knowledge-based system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper reports the development of a computer-based system for production scheduling in a dedicated FMS. The system is based on the state-operator framework commonly used in artificial intelligence. Such a system consists of three components: (i) a knowledge base of states, which describes both the current task domain situation and the goal to be achieved; (ii) a set of operators that are used to manipulate the knowledge base; and (iii) a control strategy to decide which operators to apply next and to resolve conflicts. Some of the interesting features of the scheduling system include: (i) the ability to detect resource conflicts; (ii) the ability to determine alternate routes for a given part in the event of a resource conflict; and (iii) the ability to amend plans if an alternate route is found. These features allow the system to take advantage of the flexible routing for parts that an FMS allows. The system has been implemented using the XLISP programming language. Implementation considerations are discussed. A small but comprehensive example is presented. Further research directions are suggested.
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  • 7
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    Annals of operations research 12 (1988), S. 217-239 
    ISSN: 1572-9338
    Keywords: Propositional logic ; resolution ; integer programming ; theorem proving ; artificial intelligence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper illustrates how the application of integer programming to logic can reveal parallels between logic and mathematics and lead to new algorithms for inference in knowledge-based systems. If logical clauses (stating that at least one of a set of literals is true) are written as inequalities, then the resolvent of two clauses corresponds to a certain cutting plane in integer programming. By properly enlarging the class of cutting planes to cover clauses that state that at least a specified number of literals are true, we obtain a generalization of resolution that involves both cancellation-type and circulant-type sums. We show its completeness by proving that it generates all prime implications, generalizing an early result by Quine. This leads to a cutting-plane algorithm as well as a generalized resolution algorithm for checking whether a set of propositions, perhaps representing a knowledge base, logically implies a given proposition. The paper is intended to be readable by persons with either an operations research or an artificial intelligence background.
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  • 8
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    Annals of operations research 12 (1988), S. 285-296 
    ISSN: 1572-9338
    Keywords: Situation assessment ; human-machine interface ; intelligent assistant ; intelligent interface ; human-machine system ; artificial intelligence ; operations research ; knowledge-based systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract To perform tactical situation assessment effectively, a system must be capable of performing tactical information integration, interpretation, and threat evaluation. This paper describes a prototype system for naval surface warfare which incorporates a human operator for integration, an artificial intelligence-based subsystem for interpretation, and an operations research-based system for evaluation. The system provides the operator with an interactive environment for displaying and managing tactical information and tools for interpreting and evaluating it.
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  • 9
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    Annals of operations research 16 (1988), S. 185-197 
    ISSN: 1572-9338
    Keywords: risk management ; decision analysis ; expert systems ; artificial intelligence ; operations research
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper describes and evaluates three different approaches to building decision support systems: the Operations Research/Management Science approach, the Decision Analysis/Multiattribute Utility approach, and the Artificial Intelligence/Expert Systems approach. It evaluates the usefulness of the three approaches for risk management. In particular, it defines evaluation objectives of risk analysts, risk managers, and laypeople and provides a subjective assessment how the three approaches stack up against their objectives. The paper concludes that for most risk management applications a combination of the three approaches would be most desirable.
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  • 10
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    Annals of operations research 12 (1988), S. 241-276 
    ISSN: 1572-9338
    Keywords: Mixed-integer programming ; logic ; representability ; artificial intelligence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract We study the formation of mixed-integer programming (MIP) constraints through the development of constructions which syntactically parallel the set operations of union, intersection, Cartesian product, and linear affine transformation. In this manner, we are able to both modularize the work of constructing representations (as the representations for base sets of a composite construction need not be disjunctively derived) and to make connections to certain of the logic-based approaches to artificial intelligence which utilize the intersection (“and”) and union (“or”) operations. We provide results which allow one to “calculate” the linear relaxation of a composite construction, in terms of set operations on the relaxation of the base sets. We are also able to compare the size of the relaxations for different formulations of the same MIP set, when these different formulations arise from one another through distributive laws. Utilizing these results, we generalize the Davis-Putnam algorithm of propositional logic to an MIP form, and answer a question regarding the relative efficiency of two versions of this algorithm. In this context, the subroutines of the logic algorithm correspond to list processing subroutines for MIP to be used prior to running linear programs. They are similar in nature to preprocessing routines, wherein entire MIP constraint sets are manipulated as formal symbols of logic.
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  • 11
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    Journal of risk and uncertainty 1 (1988), S. 101-124 
    ISSN: 1573-0476
    Keywords: risk aversion ; bargaining ; experiments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract This paper reports the results of three experiments designed to test the predictions of the principal game-theoretic models of bargaining concerning the influence of risk aversion on bargaining outcomes. These models predict that risk aversion will be disadvantageous in bargaining except in situations in which potential agreements are lotteries with a positive probability of being worse than disagreement. The experimental results support the models' predictions. However, in the range of payoffs studied here, the effects due to risk aversion may be smaller than some of the focal point effects observed in previous experiments. Implications for further theoretical and experimental work are considered.
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  • 12
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    Journal of risk and uncertainty 1 (1988), S. 395-413 
    ISSN: 1573-0476
    Keywords: risk aversion ; certainty equivalent ; multivariate utilities ; independent risks ; comparative concavity ; multiple risks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract The more risk-averse of two individuals need not have the smaller certainty equivalent for a risk \~x if another risk or combination of risks w is present. It is shown that he must, however, if either individual's conditional certainty equivalent for x is increasing in w. For independent risks, this condition follows immediately if either individual is decreasingly risk-averse, giving a natural proof of a known result. Another short proof of this result and necessary and sufficient conditions in the independent case are give. For multivariate utilities, the corresponding results do not hold, but it is proved simply that any mixture of decreasingly risk-averse utilities is decreasingly risk-averse. Also touched upon are risk aversion's relation to generalized means, concave composition, risk sharing, and interest rates, the application of the results to discounting under uncertainty and selection of investment level, and their connection to singly crossing distributions, noise, and dominance.
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  • 13
    ISSN: 1572-9974
    Keywords: Expert systems ; economics ; auction bidding markets ; artificial intelligence ; economic modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Economics
    Notes: 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.
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  • 14
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    Computational economics 1 (1988), S. 97-111 
    ISSN: 1572-9974
    Keywords: Revealed preference ; artificial intelligence ; logic programming ; PROLOG ; rational choice ; homotheticity ; approximate rationality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Economics
    Notes: Abstract This paper shows the direct translation of revealed preference theory into a logic program. Tests of exact and approximate rationality based on the economic theory of revealed preference are presented in PROLOG. A special case of homothetic preference of the consumer behavior is also considered.
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  • 15
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    Theory and decision 24 (1988), S. 169-200 
    ISSN: 1573-7187
    Keywords: decision theory ; risk ; expected utility ; security level ; risk aversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: 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.
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