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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Economic theory 4 (1994), S. 417-435 
    ISSN: 1432-0479
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Summary This paper explores the possibility of designing strategy-proof mechanisms yielding satisfactory solutions to the marriage and to the college admissions problem. Our first result is negative. We prove that no strategy-proof mechanism can always choose marriages that are individually rational and Pareto efficient. This strengthens a result by Roth (1982) showing that strategy-proof mechanisms cannot always select stable marriages. The result also applies, a fortiori, to college admissions. Since finding difficulties with strategy-proofness is quite an expected result, we then address a second question which is classical within the incentives literature. Are there restrictions on the preferences of agents under which strategy-proof and stable mechanisms do exist? We identify a nontrivial restriction on the domain of preferences, to be called top dominance, under which there exist strategy-proof and stable mechanisms for both types of matching problems. The mechanisms turn out to be exactly those that derive from the most classical algorithms in the literature; namely, the women's optimal, the men's optimal and the student's optimal. Finally, top dominance is shown to be essentially necessary, as well as sufficient, for the existence of strategy-proof stable matching mechanisms.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Spanish economic review 2 (2000), S. 153-153 
    ISSN: 1435-5477
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Review of economic design 5 (2000), S. 111-127 
    ISSN: 1434-4750
    Keywords: Key words: Incentives, adverse selection, strategy-proofness, reward schemes, labour-managed firms ; JEL classification: D82, J54, D20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract. We consider a simple case of team production, where a set of workers have to contribute a single input (say labour) and then share the joint output amongst themselves. Different incentive issues arise when the skills as well as the levels of effort expended by workers are not publicly observable. We study one of these issues in terms of a very simple model in which two types of workers, skilled and unskilled, supply effort inelastically. Thus, we assume away the problem of moral hazard in order to focus on that of adverse selection. We also consider a hierarchical structure of production in which the workers need to be organised in two tiers. We look for reward schemes which specify higher payments to workers who have been assigned to the top-level jobs when the principal detects no lies, distribute the entire output in all circumstances, and induce workers to revel their true abilities. We contemplate two scenarios. In the first one, each individual worker knows only her own type, while in the second scenario each worker also knows the abilities of all other workers. Our general conclusion is that the adverse selection problem can be solved in our context. However, the range of satisfactory reward schemes depends on the informational framework.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Social choice and welfare 11 (1994), S. 241-252 
    ISSN: 1432-217X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: Abstract We characterize strategy-proof social choice functions when individuals have strictly quasi-concave, continuous and satiated utility functions on convex subsets of IR m , representing preferences for the provision of m pure public goods. When specialized to the case m=1, these assumptions amount to requiring that preferences are single peaked, and for such a domain there exists a wide class of strategy-proof social choice functions. These were studied by Moulin (1980) under strong additional assumptions. Our first results characterize the complete class, after an appropriate extension of the single-peakedness condition. The new characterization retains the flavour of Moulin's elegant representation theorem. For the general m-dimensional case, previous results have shown that there is no efficient, strategy-proof, nondictatorial social choice function, even within the domain restrictions under consideration (Border and Jordan 1983; Zhou 1991). In fact, Zhou's powerful result indicates that nondictatorial strategy-proof s.c.f.'s will have a range of dimension one. This allows us to conclude with a complete characterization of all strategy-proof s.c.f.'s on IR m , because restrictions of preferences from our admissible class to one dimensional subsets satisfy the slightly generalized notion of single-peakedness that is used in our characterization for the case m=1. We feel that a complete knowledge of the class of strategy-proof mechanisms, in this as well as in other contexts, is an important step in the analysis of the trade-offs between strategy-proofness and other performance criteria, like efficiency.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Social choice and welfare 16 (1999), S. 321-336 
    ISSN: 1432-217X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: Abstract. We characterize the maximal sets of preferences under which generalized median voter schemes are strategy-proof. Those domains are defined by a qualified version of single-peakedness, which depends on the distribution of power among agents implied by each generalized median voter scheme.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1436-5073
    Keywords: Key words: 4-Nitrophenol; differential pulse voltammetry; zeolite-modified carbon paste electrode.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract  A zeolite-modified carbon paste electrode (CPE) has been used for the determination of 4-nitrophenol by differential pulse voltammetry (DPV). The electrochemical reduction of 4-nitrophenol at −1.0 V is carried out in a Britton-Robinson medium at pH 3.5. The cyclic voltammetric (CV) behaviour has been investigated to study the nature of the process. Studies on the effect of pH were carried out over the pH range 2–9 with the Britton-Robinson buffer solution, and the influence of pH on peak height and peak potential was analyzed. A linear relationship between peak intensity and concentration is obtained in the range 0.2–10 mg L−1, with a detection limit of 0.04 mg L−1; a relative standard deviation of 1.5% for a 5 mg L−1 4-nitrophenol concentration and a relative error of 2.6% were also obtained (n=11).
    Type of Medium: Electronic Resource
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