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Rivals
Terms modified by Rivals Selected AbstractsTrekking through history: the Huaorani of Amazonian Ecuador , By Laura M RivalTHE JOURNAL OF THE ROYAL ANTHROPOLOGICAL INSTITUTE, Issue 2 2008Luisa Elvira Belaunde [source] Identifying Rivals and Rivalries in World PoliticsINTERNATIONAL STUDIES QUARTERLY, Issue 4 2001William R. Thompson Instead of assuming that all actors are equally likely to clash, and that they do so independently of previous clashes, rivalry analysis can focus on the small number of feuding dyads that cause much of the trouble in the international system. But the value added of this approach will hinge in part on how rivalries are identified. Rivalry dyads are usually identified by satisfying thresholds in the frequency of militarized disputes occurring within some prespecified interval of time. But this approach implies a number of analytical problems including the possibility that rivalry analyses are simply being restricted to a device for distinguishing between states that engage in frequent and infrequent conflict. An alternative approach defines rivalry as a perceptual categorizing process in which actors identify which states are sufficiently threatening competitors to qualify as enemies. A systematic approach to identifying these strategic rivalries is elaborated. The outcome, 174 rivalries in existence between 1816 and 1999 are named and compared to the rivalry identification lists produced by three dispute density approaches. The point of the comparison is not necessarily to assert the superiority of one approach over others as it is to highlight the very real costs and benefits associated with different operational assumptions. The question must also be raised whether all approaches are equally focused on what we customarily mean by rivalries. Moreover, in the absence of a consensus on basic concepts and measures, rivalry findings will be anything but additive even if the subfield continues to be monopolized by largely divergent dispute density approaches. [source] Riches, Rivals and Radicals: 100 Years of Museums in America by schwarzer, marjorieJOURNAL OF AESTHETICS AND ART CRITICISM, Issue 3 2007HILDE HEIN First page of article [source] God's Rivals: Why has God Allowed Different Religions?RELIGIOUS STUDIES REVIEW, Issue 3 2008By Gerald R. McDermott, Insights from the Bible, the Early Church No abstract is available for this article. [source] A theory of quality-related differences in retail margins: why there is a ,premium' on premium gasolineECONOMIC INQUIRY, Issue 4 2000JM Barron This paper develops a theory of vertical and horizontal product differentiation to explain observed price-cost margin differentials for goods that differ in quality. The difference in price-cost margins between the high- and low-quality goods is shown to depend positively on consumers' average valuation for incremental increases in quality and positively on the distance to each competitor's closest rival. These predictions are largely supported using an extensive station-level data set of premium and regular unleaded gasoline prices from the Los Angeles Basin area from 1992,1995. [source] Reach for the Stars: A Strategic Bidding GameECONOMICA, Issue 272 2001Lynne M. Pepall We examine two,sided competition in a duopoly market for differentiated products. Downstream, the two firms compete in prices. Upstream, they compete in bidding to hire talent input and there is one unique superstar. The outcome depends on the downstream effect of only one firm employing the superstar. When this intensifies downstream competition, both firms are worse off than they would be if no superstar talent were available. When the hiring of the superstar softens downstream competition, both firms benefit, but a ,winner's curse' emerges in which the firm winning the superstar talent earns less profit than its rival. [source] Memory of Social Partners in Hermit Crab DominanceETHOLOGY, Issue 3 2005Francesca Gherardi We investigated the possibility that invertebrates recognize conspecific individuals by studying dominance relationships in the long-clawed hermit crab, Pagurus longicarpus. We conducted three sets of laboratory experiments to define the time limits for acquiring and maintaining memory of an individual opponent. The results reveal two characteristics that make individual recognition in this species different from standard associative learning tasks. Firstly, crabs do not require training over many repeated trials; rather, they show evidence of recognition after a single 30-min exposure to a stimulus animal. Secondly, memory lasts for up to 4 d of isolation without reinforcement. A third interesting feature of individual recognition in this species is that familiar opponents are recognized even before the formation of a stable hierarchical rank. That is, recognition seems to be relatively independent of repeated wins (rewards) or losses (punishments) in a dominance hierarchy. The experimental protocol allowed us to show that this species is able to classify conspecifics into two ,heterogeneous subgroups', i.e. familiar vs. unfamiliar individuals, but not to discriminate one individual of a group from every other conspecific from ,a unique set of cues defining that individual'. In other words, we demonstrated a ,binary', and not a ,true', individual recognition. However, 1 d of interactions with different crabs did not erase the memory of a former rival, suggesting that P. longicarpus uses a system of social partner discrimination more refined than previously shown. [source] Breeding Tubercles, Papillomatosis and Dominance Behaviour of Male Roach (Rutilus rutilus) During the Spawning PeriodETHOLOGY, Issue 8 2004Raine Kortet We studied the relationship between the breeding tubercle ornamentation (i.e. skin roughness) and male pre-spawning dominance and courtship behaviour in roach (Rutilus rutilus) within an experimental laboratory system. Sexually mature fish were caught during their migration to their spawning pond and their behaviours were studied in an artificial spawning arena. Males behaved naturally both in terms of male,male interactions and attempts to achieve spawnings. Males having many, large breeding tubercles (i.e. rough skin) were significantly more often dominant in our dyadic trials than those with smooth skin. The dominant male in the trial exhibited a more active courtship behaviour than its subordinate rival. Papilloma skin disease did not affect the dominance rank. As a result of the relationship between skin roughness and male dominance, breeding tubercles may be used by the females as a cue for choosing a high-quality mate in a roach lek. Thus, breeding tubercles might offer a workable tool for examination of sexual selection among cyprinids. [source] Male Competition over Access to Females in a Spider with Last-Male Sperm PrecedenceETHOLOGY, Issue 5 2003Daniela Schaefer Agonistic behaviour between male cellar spiders (Pholcus phalangioides) was investigated to test whether (1) size difference determines which male achieves access to the female, (2) males are able to monopolize access to the female until egg laying and whether (3) female resource value increases before egg laying because of last-male sperm precedence. We further investigated whether (4) there is variation in time and energy spent on courtship and copulation depending on the degree of sperm competition, i.e. with or without rival present. In three experimental settings we introduced two males of either different or similar sizes, or a single male to a female. The mating units were constantly video-observed until the females produced their first egg sac. Experience, ownership and female resource value in terms of body size was controlled. Our results show that larger males achieve almost exclusive access to females. Size symmetrical settings resulted in increased fighting activity and duration but dominance did not influence mating success. If copulations were disturbed by the rival male, copulations were terminated earlier in symmetrical settings compared with asymmetrical settings. In 94.8% of trials only one copulation took place, suggesting that the copulating male successfully monopolized access to the female. Males confronted with a rival copulated longer but courted significantly shorter than lone males. Although the last male to copulate sires 88% of the offspring in P. phalangioides, neither fighting nor courtship activity increased before the female laid a batch of eggs. This suggests that males have no indication of the timing of oviposition. [source] Corporate Domesticity and Idealised Masculinity: Royal Naval Officers and their Shipboard Homes, 1918,39GENDER & HISTORY, Issue 3 2009Quintin Colville This article explores the interrelationship of masculine identity and corporate domesticity through the example of Royal Naval officers and the quarters they occupied on board ship during the 1920s and 1930s. Through a case study of a surviving warship, it establishes the linkages of this environment to a wider upper-middle-class world of public school common rooms, gentlemen's clubs and family homes. It analyses the role of this shipboard domesticity in defining the idealised and class-specific persona of the naval officer: constructed through foregrounding approved qualities (such as dutifulness, restraint and self-discipline), and suppressing characteristics considered problematic (for instance, introspection, individualism and intellectualism). The article also evaluates the tensions generated by these impersonal and unreachable standards, and the simultaneous ability of the naval home to support corporate and individual behaviours at odds with the officer ideal. The final section explores the gendered nature of these spaces. It argues that while the shipboard home was essentially a male one, the dynamic it engineered between rival ,male' and ,female' domesticities was invariably relational. Officers' communal quarters were routinely used to support and intensify oppositional understandings of masculinity and femininity. Nonetheless, attempts to dispute these boundaries and to internalise feminised qualities of sentiment, attachment and dependency can be detected in the privatised domesticity of the cabin. [source] Robert Southey, Lord Macaulay and the Standard of Living ControversyHISTORY, Issue 284 2001W. A. Speck The early nineteenth century witnessed gladiatorial contests in print between the contributors to the conservative Quarterly Review and the radical Edinburgh Review. Among the chief protagonists of the two papers were Robert Southey, leading contributor to the Quarterly from its launch in 1809 until 1839, and Thomas Babington Macaulay, whose first contribution to the Edinburgh, on ,Milton', appeared in August 1825, after which he became a mainstay of the periodical. Their ,reviews' were long essays of 10,000 or more words, in which the works purportedly being reviewed were mere pegs on which to hang their own observations. They were generally scathing about publications which took an ideological stance opposite to their own, and sympathetic to those which adopted a similar position to that which they held. Though they frequently made barbed references to each other in their reviews, Southey never reviewed a work by Macaulay, who only once criticized one by his rival. Nevertheless, that particular occasion, in January 1830, was a classic clash of Titans. It demonstrated their fundamental disagreement over the prospects facing society from the initial impact of the industrial revolution. [source] International Relations Theory and European IntegrationJCMS: JOURNAL OF COMMON MARKET STUDIES, Issue 2 2001Mark A. Pollack The explicit effort to theorize about the process of European integration began within the field of international relations (IR), where neofunctionalism and intergovernmentalism long remained the dominant schools of thought. With the relaunching of the integration process in the 1980s and 1990s, however, IR scholars have begun to approach the study of the European Union using more general, and generalizable, theoretical approaches. This article examines the recent debate among realists, liberals, rational-choice institutionalists, and constructivists regarding the nature of the integration process and the EU as an international organization. Although originally posed as competing theories, I argue, realist, liberal and institutionalist approaches show signs of convergence around a single rationalist model, with constructivism remaining as the primary rival, but less developed, approach to the study of European integration. [source] Cautious response of inexperienced birds to conventional signal of stronger threatJOURNAL OF AVIAN BIOLOGY, Issue 6 2007Tomasz S. Osiejuk Several studies demonstrated that bird song functions as a first line of territorial defence. The efficiency of deterring rivals depends strongly on the strategy of singing used (e.g. alternating/overlapping singing, singing with low/high rate, matching song type of a rival or singing different type). Causes of between males variation during countersinging are still not fully understood, especially when different signals have similar production costs and their meaning is assigned by arbitrary convention (conventional signalling). We tested whether an oscine bird with small repertoire size, the ortolan bunting Emberiza hortulana, differentiate strategy of responding to song of an intruder in relation to its age and threat value of signals. We performed playback experiments to measure response of second year (SY) and after second year (ASY) males to a song of low (eventual variety singing) and high (immediate variety singing) threat value. We found substantial differences in response to playback, which were related both to the type of stimuli used and age of responding males. Both SY and ASY males gave more calls than songs in response to immediate variety playback, which suggest stronger vocal response to the signal of higher threat value. Approaching loudspeaker was similar for both age classes when lower threat value signal was played back, while simultaneously SY males clearly avoided approaching loudspeaker when stronger threat values signal was played back. We conclude that ortolan bunting differentiate response to signal of different threat value and that the strength of response depends on the age of a male. This study provides experimental evidence that age of receiver affects its response to a territorial intruder. It also demonstrates that observed in many studies variation in response to playback may be an effect of age differences between males, which rarely is controlled. [source] Vertical Networks, Integration, and ConnectivityJOURNAL OF ECONOMICS & MANAGEMENT STRATEGY, Issue 2 2009Pinar Do This paper studies competition in a network industry with a stylized two layered network structure, and examines: (i) price and connectivity incentives of the upstream networks, and (ii) incentives for vertical integration between an upstream network provider and a downstream firm. The main result of this paper is that vertical integration occurs only if the initial installed-base difference between the upstream networks is sufficiently small, and in that case, industry is configured with two vertically integrated networks, which yields highest incentives to invest in quality of interconnection. When the installed-base difference is sufficiently large, there is no integration in the industry, and neither of the firms have an incentive to invest in quality of interconnection. An industry configuration in which only the large network integrates and excludes (or raises cost of) its downstream rival does not appear as an equilibrium outcome: in the presence of a large asymmetry between the networks, when quality of interconnection is a strategic variable, the large network can exercise a substantial market power without vertical integration. Therefore, a vertically separated industry structure does not necessarily yield procompetitive outcomes. [source] Randal Heeb Innovation and Vertical Integration in Complementary MarketsJOURNAL OF ECONOMICS & MANAGEMENT STRATEGY, Issue 3 2003Randal Heeb This paper studies vertical integration by an essential-good monopolist into complementary markets. Unlike previous studies of complementary products, consumers are allowed to purchase some components of a complementary basket, but not others. Two different pricing strategies by the integrated firm may emerge. In mass-market equilibria, the price of the complement under integration is zero and it is given away with the essential good. Niche-market equilibria have more conventional pricing. This dichotomy is consistent with consumer software pricing. Integration enhances consumer and total surplus, unless it leads to exit by the higher-quality rival, in which case welfare is reduced. Exit is most likely when it is least damaging to consumer welfare. Integration reduces innovation by the rival firm. The effect on innovation by the integrated firm is ambiguous, but numerical computation of an extended model indicates that integration increases the innovation of the integrated firm and enhances welfare. [source] Strategic Quality Decisions under Heterogeneous Resource EndowmentsJOURNAL OF ECONOMICS & MANAGEMENT STRATEGY, Issue 2 2001Byong-Duk Rhee The literature on product competition advocates a differentiation strategy assuming firm homogeneity in resources. However, firm heterogeneity in resource endowments has long been recognized in economics. Merging these two perspectives, we show that the increase in consumer preference for quality leads to firms' aggressive price competition instead of quality differentiation. As consumers look for higher quality, the cost advantage arising from superior resources increases and makes head-to-head competition more profitable than accommodating a less efficient rival. When consumers are highly concerned about quality, even a small resource difference leads a more efficient firm to initiate cutthroat price competition for market dominance. [source] Group Identification: The Influence of Group Membership on Retail Hardware Cooperative Members' PerceptionsJOURNAL OF SMALL BUSINESS MANAGEMENT, Issue 2 2004Leslie McClintock Stoel Due to the increasing popularity of retail cooperatives in hardware retailing, a new competitive dynamic has emerged, a hybrid of intratype/intergroup competition. Individual members of one cooperative group now fight for market share with one or more members of competing cooperative groups, in an effort to attain individual goals, as well as group goals. A model of competition that includes both individual and group conditions was tested. Results of the structural equation model (SEM) show that the data fit the theoretical model well (,2=12.414, 8 df, p=0.134, NFI=0.990, NNFI=0.993, CFI=0.996). Our results indicate that, for members of cooperative groups, feelings of identification with the cooperative group resulted in increased perceptions of conflict with a rival who was a member of a competing cooperative and that feelings of group identification influenced beliefs about the importance of competitive behaviors relative to that rival. [source] MONOPOLY, POTENTIAL COMPETITION AND PRIVATE STOCK INFORMATION IN EXHAUSTIBLE RESOURCE MARKETSNATURAL RESOURCE MODELING, Issue 4 2000MARK D. AGEE ABSTRACT. This paper develops an exhaustible resource model with an incumbent monopolist that faces future potential entry of a single rival or backstop technology. The model is characterized by private stock information in the sense that firms do not know with certainty the size and/or quality of their rival's reserve stock. Results indicate that if such information is private, the strategic response of the monopolist to an entry threat is to extract reserves in the pre-entry era at a rate faster than would a pure monopolist in an uncontested market, and thus could lead to an improvement in economic welfare relative to the situation where entry is restricted. [source] Capacity allocation with traditional and Internet channelsNAVAL RESEARCH LOGISTICS: AN INTERNATIONAL JOURNAL, Issue 8 2006Yue Dai Abstract In this paper we study a capacity allocation problem for two firms, each of which has a local store and an online store. Customers may shift among the stores upon encountering a stockout. One question facing each firm is how to allocate its finite capacity (i.e., inventory) between its local and online stores. One firm's allocation affects the decision of the rival, thereby creating a strategic interaction. We consider two scenarios of a single-product single-period model and derive corresponding existence and stability conditions for a Nash equilibrium. We then conduct sensitivity analysis of the equilibrium solution with respect to price and cost parameters. We also prove the existence of a Nash equilibrium for a generalized model in which each firm has multiple local stores and a single online store. Finally, we extend the results to a multi-period model in which each firm decides its total capacity and allocates this capacity between its local and online stores. A myopic solution is derived and shown to be a Nash equilibrium solution of a corresponding "sequential game." © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006 [source] Triangular Contests and Caucus Rhetoric at the 1885 General Election*PARLIAMENTARY HISTORY, Issue 2 2008JAMES OWEN This article explores the role played by late-Victorian political associations during parliamentary election campaigns. The central hypothesis is that party organisation, known popularly as the ,caucus', is best understood as a rhetorical device used by politicians and the press to gain legitimacy in the new context created by an expanded and quasi-democratic electorate. The hypothesis is tested by examining the 1885 general election campaigns in Nottingham West and Sheffield Central. Both constituencies witnessed a triangular contest whereby an ,additional' candidate, standing on a radical platform, entered the campaign and pursued a distinctly ,anti-caucus' agenda that was aimed primarily at the local Liberal Party Association. The manner in which the ,caucus' issue was articulated by all sides involved throws new light on the role played by party organisation during this period. While all sides described their association in a way that both defended and asserted its legitimacy, they equally used ,anti-caucus' rhetoric to diminish the credibility of their opponent's organisation, even though they were emulating the deeds they were denouncing. Indeed, it was those within official Liberalism that indulged in the most virulent ,anti-caucus' rhetoric. Thus, it is suggested that, with regard to the attitude of radicals towards official Liberalism, this ,anti-caucus' rhetoric reflected not a real popular resistance against party organisation or ,party', but simply intense competition and imitation between rival ,caucuses'. [source] Former partners and new rivals as threats to a relationship: Infidelity type, gender, and commitment as factors related to distress and forgivenessPERSONAL RELATIONSHIPS, Issue 3 2004Arnie Cann The overall aim of this study was to examine differences in responses to relationship infidelity when the infidelity involves a former romantic partner as opposed to a new rival. Participants indicated, for either sexual or emotional infidelity, whether they would be more upset if their partner were involved with a former partner or a new person, and whether they would be forgiving. Men and women saw the former partner as a greater threat when the infidelity was sexual. However, for emotional infidelity, only women selected the former partner more frequently. Ratings of the degree of distress and likelihood of forgiveness followed a similar pattern. For women, measures of relationship commitment were related to distress and forgiveness. For men, these measures were related to forgiveness only. The gender differences in distress may be related to differences between men and women in beliefs about the importance of commitment. [source] Distress about mating rivalsPERSONAL RELATIONSHIPS, Issue 3 2000DAVID M. BUSS This research tested the evolutionary psychological hypothesis that men and women would be most distressed about threats from rivals who surpass them on sex-linked components of mate value. Six predictions were tested in samples from three cultures, the United States (N= 208), the Netherlands (N= 349), and Korea (N= 174). Five predictions were supported in all three cultures. Korean, Dutch, and American men, more than corresponding women, report greater distress when a rival surpasses them on financial prospects, job prospects, and physical strength. Korean, Dutch, and American women, in contrast, report greater distress when a rival surpasses them on facial and bodily attractiveness. The cultures differed on some variables. Korean women and men, for example, differed from Americans and Dutch in reporting more distress over rivals who had better financial prospects, better job prospects, and higher status and prestige. Americans exceeded Koreans in reporting distress when rivals had more attractive faces and bodies, whereas the Dutch exceeded the other cultures in reporting more distress when rivals had a better sense of humor. Discussion focuses on possible proximate psychological mechanisms underlying distress over rivals and the theoretical importance of intrasexual competition. [source] Collective Action Meets Prospect Theory: An Application to Coalition Building in Chile, 1973,75POLITICAL PSYCHOLOGY, Issue 3 2004Maria Fanis Expected utility theory explains collective action as an attempt by individuals to maximize their gains. In contrast, my application of prospect theory to collective action suggests that people are motivated to participate in collective action by a fear of loss. These alternative rationalities are considered in the context of the successful cooperative effort of four economic groups in Chile during 1973,75, the first years of the Pinochet military regime. In this case, the logic of prospect theory better captures how actors made decisions about whether or not to engage in collective action. Of the four groups that did join the 1973,75 economic coalition, only one (the mineowners) appears to have maximized its net asset level, as expected utility theory predicts. All four groups seem to have been motivated to cooperate because they found themselves in the domain of losses and expected that cooperation with other, even rival, economic groups might help them recoup their recent losses. [source] Equity and the Kyoto ProtocolPOLITICS, Issue 1 2007Edward Page Global climate change raises a number of important issues for political scientists and theorists. One issue concerns the ethics of implementing policies that seek to manage the threats associated with dangerous climate change in order to protect the interests of future generations. The focus of much of the debate about climate change and inter-generational equity is the United Nations Framework Convention on Climate Change (FCCC) and the Kyoto Protocol to this Convention. This article outlines the mechanisms adopted by the Kyoto Protocol and three rival ,climate architectures', evaluating each in terms of some basic principles of equity. [source] Creativity and oedipal fantasy in Austen's Emma: ,An ingenious and animating suspicion'THE INTERNATIONAL JOURNAL OF PSYCHOANALYSIS, Issue 4 2003Margaret Ann Fitzpatrick Hanly Austen's Emma is one of the great novels of the Western tradition. In this paper the author explores the meaning of Emma's ,ingenious and animating suspicion' that Jane Fairfax seduced her best friend's husband, Mr Dixon. The interpretation that a psychoanalytic understanding makes possible shows how this suspicion represents an oedipal fantasy projected on to Miss Fairfax. Further exploration demonstrates how the fantasy is linked both to Emma's systematic unkindness to Jane Fairfax and to Emma's famous insult to Jane's aunt, Miss Bates. Emma's suspicion projects an oedipal fantasy with its incestuous impulses on to her rival and satisfies an envious aggression at the same time. The author's purpose in this paper is to bring to light through psychoanalytic understanding Austen's dramatisation of the complexity and creativity of the oedipal situation. In addition to the regression in oedipal fantasy, the primary process also functions with a progressive quality that expands and enriches the ego, a double movement described in Keats's ,negative capability', which has been elaborated by Bion. The primal-scene fantasies are often brought alive in the analytic transference. These situations and painful emotions are dramatically portrayed through Austen's genius as vehicles for change. A sudden integration follows a phase of disorganization: ,It darted through her with the speed of an arrow. Mr Knightley must marry no-one but herself'. Emma, who is Austen's ,imaginist', moves from the projected fantasy of the sad love triangle through envy aggression and the narcissistic blows of self-doubt and loss of love to moments of illumination and connection. [source] HUB-AIRPORT COMPETITION: CONNECTING TIME DIFFERENTIATION AND CONCESSION CONSUMPTION,AUSTRALIAN ECONOMIC PAPERS, Issue 4 2006MING HSIN LIN This paper develops a network model to analyse the economic effects resulting from the non-price competition between the home country's and neighbouring country's hub-airports. Focusing on the trade-off relationship between the length of the connecting time in the hub-airport and the consumption opportunities of the transfer passengers, we demonstrate theoretically that even though the hub-airport bears a cost disadvantage over its rival in providing the hub-airport service, it still has a chance to earn more profits than its rival by the setting of the connecting time. This finding suggests a new methodology for hub-airports that attempt to alleviate price competition. [source] Low-Price Low-Capacity Traps and Government Intervention in the Québec Hog MarketCANADIAN JOURNAL OF AGRICULTURAL ECONOMICS, Issue 3 2004Bruno Larue This paper investigates the marketing of a primary commodity produced by competitive producers that sell to a single downstream processor. There is a significant lag between production and marketing decisions made by producers. If a credible price commitment cannot be made before producers make their output decision, it is a dominant strategy for the processor to buy producers' output at the world price adjusted for transportation costs. Producers fully anticipate this partial holdup ex ante and adjust production accordingly. When the processor's capacity is binding ex post, the equilibrium is described as a low-price, low-capacity trap. Under a specific condition, the processor finds it advantageous to credibly commit to a price increment before producers make their output decision. The ensuing equilibrium is Pareto-superior to the no-commitment equilibrium. We argue that the Québec hog/pork industry has experienced such a situation in the past few years. Government intervention is justified even if the processor has committed to a price increment. The modeling of strategic interactions between the government and the processor reveals that their price increments are strategic substitutes. However, given that the processor's (government's) payoff is increasing with the government's (processor's) price increment, the first-mover advantage entails committing early to a low-price increment to force one's rival to offer a high-price increment. Cet article analyse la mise en marché d'un produit primaire vendu par des producteurs preneurs de prix à un seul et unique transformateur. Les décisions de production et de mise en marché sont séparées dans le temps. Si le transformateur ne peut pas s'engager à payer un certain prix avant que les producteurs prennent leur décision de production, alors la stratégie dominante du transformateur est d'offrir aux producteurs le prix mondial diminué par les coûts de transport. Les producteurs anticipant ce hold-up partiel et réduisent leur production en conséquence. Lorsque le transformateur est confrontéà une contrainte de capacité ex post, les producteurs et le transformateur sont piégés dans un équilibre de « petit prix et petit volume ». Si une condition est respectée, il peut être avantageux pour le transformateur d'offrir un supplément aux producteurs avant leur décision de production. L'équilibre qui s'en suit constitue alors une amélioration au sens de Pareto. Nous soumettons que l'industrie porcine québécoise a vécu pareille expérience durant les dernières années. L'intervention du gouvernement demeure justifiée même si le transformateur s'est commis à payer un supplément. En fait, les interventions du transformateur et du gouvernement sont des substituts stratégiques. Puisque le gain du transformateur (gouvernement) croit avec le supplément offert par le gouvernement (transformateur), il y a un avantage àêtre le premier à se commettre à payer un faible supplément, tant pour le transformateur que pour le gouvernement, pour ainsi forcer l'autre partie à offrir un supplément plus généreux. [source] Gender differences in rival characteristics that evoke jealousy in response to emotional versus sexual infidelityPERSONAL RELATIONSHIPS, Issue 4 2004Bram P. Buunk Previous research has shown that in men jealousy is evoked more by a rival's status-related characteristics than in women, whereas in women jealousy is evoked more by a rival's physical attractiveness than in men. The present study examined whether the occurrence of this gender difference depends upon the type of infidelity one's partner engages in, i.e., emotional or sexual infidelity, and whether these types of jealousy evoke different emotional responses. An experiment was conducted using hypothetical jealousy situations with a 2 (participant gender: male vs. female) × 2 (rival physical attractiveness: high vs. low) × 2 (rival dominance: high vs. low) × 2 (type of infidelity: sexual vs. emotional) mixed-factor design. Jealousy evoked by emotional infidelity was primarily characterized by feelings of threat, and jealousy after sexual infidelity was primarily characterized by feelings of betrayal and anger. Following emotional infidelity, in men, a rival's dominance, and in women, a rival's physical attractiveness, evoked feelings of threat but not feelings of anger-betrayal. In contrast, after sexual infidelity, in men, but not in women, a rival's physical attractiveness evoked feelings of betrayal-anger but not anxiety or suspicion. [source] Dental trauma incidence and mouthguard use in elite athletes in TurkeyDENTAL TRAUMATOLOGY, Issue 2 2005e Diljin Keçeci Abstract,,, Contact sports may lead to dental trauma, which often can be reduced with appropriate preventive measures. While numerous studies exist on this topic for several countries throughout the world, there is a lack of comprehensive descriptive studies in Turkey. The purpose of this study was to investigate the incidence and type of dental injuries associated with three different sports among Turkish elite athletes, who do not contact (volleyball), contact directly (taekwondo) or indirectly (handball) with competition rivals. Additionally, awareness and use of mouthguards were also compared. Thus, during the 2003 and 2004 Turkish National Championships in three sports, 50 taekwondo, 62 handball and 50 volleyball male athletes were interviewed by questionnaire. Results showed that taekwondo and handball athletes experienced significantly more dental trauma than volleyball athletes (P < 0.05). Twelve of the taekwondo (24%), 16 of the handball (26%) and four of the volleyball athletes (8%) experienced at least one type of dental injury. Awareness of mouthguards as a preventive measure against dental trauma was significantly higher among taekwondo and handball athletes (P < 0.05), although a very small percentage in either of these sports actually wore a mouthguard (10 and 0%, respectively). Trauma incidence between direct contact with rival competitors and indirect contact with rival competitors was not significantly different. The incidence of dental trauma in contact sports shows that the awareness and use of mouthguards must be intensified. Mouthguard use should be made compulsory, especially in those sports with high risk for dental trauma. [source] Two Competing Models of How People Learn in GamesECONOMETRICA, Issue 6 2002Ed Hopkins Reinforcement learning and stochastic fictitious play are apparent rivals as models of human learning. They embody quite different assumptions about the processing of information and optimization. This paper compares their properties and finds that they are far more similar than were thought. In particular, the expected motion of stochastic fictitious play and reinforcement learning with experimentation can both be written as a perturbed form of the evolutionary replicator dynamics. Therefore they will in many cases have the same asymptotic behavior. In particular, local stability of mixed equilibria under stochastic fictitious play implies local stability under perturbed reinforcement learning. The main identifiable difference between the two models is speed: stochastic fictitious play gives rise to faster learning. [source] | |||||||||||||||||||||||||||||||||||||||||||