Externality games are studied in Grafe et al. (1998, Math. Methods Op. Res. 48, 71). We define a generalization of this class of games and show, using the methodology in Izquierdo and Rafels (1996, 2001, Working paper, Univ Barcelona; Games Econ. Behav. 36, 174), some properties of the new class of generalized externality games. They include, among others, the algebraic structure of the game, convexity, and their implications for the study of cooperative solutions. Also (...) the proportional rule is characterized for this class of games. (shrink)

Load monitoring in basketball is fundamental to develop training programs, maximizing performance while reducing injury risk. However, information regarding the load associated with specific activity patterns during competition is limited. This study aimed at assessing the external load associated with high-intensity activities recorded during official basketball games, with respect to different activity patterns, playing positions, and activities performed with or without ball. Eleven male basketball players competing in the Lithuanian third division were recruited for this study. Three in-season (...) class='Hi'>games were assessed via time-motion analysis and microsensors. Specifically, the high-intensity activities including sprints, high-intensity specific movements and jumps were identified and subsequently the external load [PlayerLoad™ and PlayerLoad™/min ] of each activity was determined. Linear mixed models were used to examine differences in PL, PL/min and mean duration between activity pattern, playing positions and activities performed with or without ball. Results revealed PL was lower in jumps compared to sprints [p < 0.001, effect size = 0.68] and HSMs, while PL/min was greater in sprints compared to jumps. Jumps displayed shorter duration compared to sprints and HSMs, with HSMs lasting longer than sprints. Jumps duration was longer in backcourt than frontcourt players. When considering activity patterns combined, PL and duration were greater without ball. Regarding HSMs, PL/min was higher with ball, while duration was longer without ball. The current findings suggest that external load differences in high-intensity activities exist among activity patterns and between activities performed with and without ball, while no differences were found between playing positions. Practitioners should consider these differences when designing training sessions. (shrink)

Internet services, such as review sites, FAQ sites, online auction sites, online flea markets, and social networking services, are essential to our daily lives. Each Internet service aims to promote information exchange among people who share common interests, activities, or goods. Internet service providers aim to have users of their services actively communicate through their services. Without active interaction, the service falls into disuse. In this study, we consider that an Internet service has a network externality as its main (...) feature, and we model user behavior in the Internet service with network externality as a dynamic game. In particular, we model the diffusion process of users of an ISNE as an infinite-horizon extensive-form game of complete information in which: each user can choose whether or not to use the ISNE in her/his turn and the network effect of the ISNE depends on the history of each player’s actions. We then apply Markov perfect equilibrium to analyze how to increase the number of active users. We derive the necessary and sufficient condition under which the state in which every player is an active user is the unique Markov perfect equilibrium outcome. Moreover, we propose an incentive mechanism that enables the number of active users to increase steadily. (shrink)

In this paper we study the distribution of power in the Basque Parliament since the restoration of the Spanish democracy. The classic simple games do not fit with the particular voting rule that it is used to invest the president of the regional government. In order to model this voting mechanism we incorporate coalitional externalities to the game. We use the extensions of the most popular power indices to games with externalities that have been proposed in the most (...) recent literature. Moreover, we propose a method to estimate the probability of a given coalition based on the ideological positions of its members in a two-dimensional political spectrum. (shrink)

Martial-arts practice is not quite anything else: it is like sport, but is not sport; it constantly refers to and as it were cohabits with violence, but is not violent; it is dance-like but not dance. It shares a common athleticism with sports and dance, yet stands apart from both, especially through its paradoxical commitment to the external value of being an instrument of violence. My discussion seeks to illuminate martial arts practice by systematic contrast to games of sport (...) and works of performance art, especially dance. (shrink)

How can _Wii Sports_ teach us about metaphysics? Can playing _World of Warcraft_ lead to greater self-consciousness? How can we learn about aesthetics, ethics and divine attributes from _Zork_, _Grand Theft Auto_, and _Civilization_? A variety of increasingly sophisticated video games are rapidly overtaking books, films, and television as America's most popular form of media entertainment. It is estimated that by 2011 over 30 percent of US households will own a Wii console - about the same percentage that owned (...) a television in 1953. In _Philosophy Through Video Games, _Jon Cogburn and Mark Silcox - philosophers with game industry experience - investigate the aesthetic appeal of video games, their effect on our morals, the insights they give us into our understanding of perceptual knowledge, personal identity, artificial intelligence, and the very meaning of life itself, arguing that video games are popular precisely because they engage with longstanding philosophical problems. Topics covered include: * The Problem of the External World * Dualism and Personal Identity * Artificial and Human Intelligence in the Philosophy of Mind * The Idea of Interactive Art * The Moral Effects of Video Games * Games and God's Goodness Games discussed include: _Madden Football_, _Wii Sports_, _Guitar Hero_, _World of Warcraft_, _Sims Online_, _Second Life_, _Baldur's Gate_, _Knights of the Old Republic_, _Elder Scrolls_, _Zork_, _EverQuest_ _Doom_, _Halo 2_, _Grand Theft Auto_, _Civilization_, _Mortal Kombat_, _Rome: Total War_, _Black and White_, _Aidyn Chronicles_. (shrink)

We study the one-seller/two-buyer bargaining problem with negative identity-dependent externalities with an alternating offer bargaining model in which new owners of the object have the opportunity of resale. We identify the generically unique subgame perfect equilibrium outcome. The resale opportunity increases the competition among the buyers and therefore benefits the seller. When competition between buyers is very fierce, the seller may prefer to respond to bids rather than to propose an offer herself: a first-mover disadvantage.

Ethics in video gaming is broad topic that extends beyond the familiar instances of “moral panics”. This chapter will first divide ethical issues into internal and external moral questions. Roughly, this equates to a distinction between the ethics in games and the ethics of games. The ethical issues internal to video games arise due to both their status as fictions and their status as games. Many games afford players the opportunity to perform violent and vicious (...) acts; however, these are of course fictional actions and are often contextualized as part of the game’s competitive play. This raises the general question whether it can ever be morally wrong to perform some fictional action in a video game. To approach this question, this section will first consider how moral values are inherent within games. Players engage with the embedded moral values of games both at the level of their narratives and their rules. Games become objects for moral reflection, not only through the stories that they tell, but also through the ways in which players are invited to engage actively with those stories. Next, external ethical issues are those that focus on the nature of the gaming industry and gaming cultures. The gaming industry has notoriously struggled with representations of gender and race, both in their workforce and in the games that they produce. Turning to the ecological impacts, the gaming industry is a major source of e-waste through the production of gaming technologies. The hardware used in gaming has a lifecycle that begins with the exploitation of resource-rich developing countries that produce the precious materials used in computer screens and processing chips and ends with those same products being dumped in toxic landfills in other developing countries. Additionally, gaming is a major source of energy consumption, particularly as cloud gaming servers are required to run continuously. When considering the ethics of games, such social and ecological concerns must surely figure in one’s moral calculation. Finally, some moral issues straddle the line between the above distinction between internal and external due to the porous nature of virtual interactivity, particularly regarding multiplayer games. Various gaming cultures struggle with their own ethical issues—from the failure to promote sportsmanship in e-sports to the widespread harassment of players in online platforms. This final section will briefly consider problems with multiplayer games, harassment, and trolling. (shrink)

In Theory of Games, Braithwaite shows that mathematical theory of games can be used to shed light upon such notions as prudence and justice in situations involving human choices and co-operation between individuals. In his work on the Nature of Religious Belief he argues that just as a moral assertion is an expression of an intention to act in accordance with certain policy, so a religious assertion must be understood as a declaration of adherence to a system of (...) moral principles governing 'inner life' as well as external behaviour. (shrink)

This book presents a theoretical treatment of externalities, public goods, and club goods. The new edition updates and expands the discussion of externalities and their implications, coverage of asymmetric information, underlying game-theoretic formulations, and intuitive and graphical presentations. Aimed at well-prepared undergraduates and graduate students making a serious foray into this branch of economics, the analysis should also interest professional economists wishing to survey recent advances in the field. No other single source for the range of materials explored is currently (...) available. Topics investigated include Nash equilibrium, Lindahl equilibria, club theory, preference-revelation mechanism, Pigouvian taxes, the commons, Coase Theorem, and static and repeated games. The authors use mathematical techniques only as much as necessary to pursue the economic argument. They develop key principles of public economics that are useful for subfields such as public choice, labor economics, economic growth, international economics, environmental and natural resource economics, and industrial organization. (shrink)

UNESCO in the 2030 agenda for sustainable development establishes respect for the environment and sustainability education as key elements for the challenges of society in the coming years. In the educational context, physical education can have a vital role in sustainability education, through Traditional Sporting Games. The aim of this research was to study from an ethnomotor perspective the different characteristics of two different groups of TSG in the Canary Islands, Spain. The corpus of this investigation was made up (...) of 513 TSG, identified by two analysis techniques and collected in a database. The categories corresponding to the variables of the internal logic of the game were the type of motor interaction, related to space, relationships with time, and relationships with objects. The study also examined the variables of external logic or sociocultural conditions such as the protagonists, playing areas, and game moments. The data analysis was carried out using descriptive and inferential statistics: cross-tables, effect sizes, classification trees, and the identification of frequency areas. Of the total number of playful activities identified, most were physical activities. These activities were Quasi-games without rules and TSG as well as activities with Objects and without material. This research confirms that the TSG in the Canary Islands is a mirror of traditional culture and, from a pedagogical approach, shows great potential for material and social sustainability. (shrink)

We introduce a new class of population games called stable games. These games are characterized by self-defeating externalities: when agents revise their strategies, the improvements in the payoffs of strategies to which revising players are switching are always exceeded by the improvements in the payoffs of strategies which revising players are abandoning. We show that stable games subsume many well-known classes of examples, including zero-sum games, games with an interior ESS, wars of attrition, and (...) concave potential games. We prove that the set of Nash equilibria of any stable game is convex, and offer an elementary proof of existence of equilibrium. Finally, we show that the set of Nash equilibria of a stable game is globally asymptotically stable under a variety of evolutionary dynamics. These convergence results are proved by constructing Lyapunov functions defined in terms of revision potentials—that is, potential functions for the protocols agents follow when they consider switching strategies. (shrink)

Learning to live together is the central concern of education everywhere in the world. Traditional sporting games provide interpersonal experiences that shape miniature communities charged with emotional meanings. The objective of this study was to analyze the ethnomotor features of TSG in three Catalan-speaking Autonomous Communities and to interpret them for constructing emotional communities. The study followed a phenomenological-interpretative paradigm. The identification of TSG was done by a hermeneutic methodological approach by using an exhaustive exploratory documentary research. We studied (...) 503 games collected in the Dictionary Català-Valencià-Balear de Alcover and Moll. Instruments and procedure: A database was built up with information about the internal and external logic of the games. The validity of the information was confirmed by means of a concordance test between the researchers. Data processing was carried out by means of classification trees, identifying the predictive variables of the types of TSG. Most of the TSGs were sociomotor games. The classification tree identified four explanatory variables. Three variables were internal traits, and one variable corresponded to external logic. Features of the TSG of the Catalan-speaking Autonomous Communities build original emotional communities. The ethnomotor regularities triggered emotional experiences associated with pleasure for living together ; domesticating of aggressiveness over opponents ; developing sustainability ; educating the competition ; and interpersonal well-being based on the community. (shrink)

The aim of this article is to provide an account of introspective knowledge concerning visual experiences that is in accordance with the idea of transparent introspection. According to transparent introspection, a person gains knowledge of her own current mental state M solely by paying attention to those aspects of the external world which M is about. In my view, transparent introspection is a promising alternative to inner sense theories. However, it raises the fundamental question why a person who pays attention (...) to something extra-mental should be epistemically justified in holding a belief about something intra-mental. In his Naturalizing the Mind, Fred Dretske solves this problem by conceiving of introspection concerning visual experiences as an inference based on a connecting belief. Although Dretske's account proves defective upon closer inspection, its essence can be salvaged by looking upon introspection as being a game of make-believe. (shrink)

Game Transfer Phenomena refers to a cluster of involuntary phenomena related to playing videogames, including sensory and cognitive intrusions, transient changes in perception and self-agency. The Game Transfer Phenomena Scale has been used to measure the frequency of GTP with respect to five factors. The present study aimed to validate an instrument for assessing the multiple dimensions of GTP that helps clarify the distinction between GTP experiences. GTP were contextualized onto the spectrum of intrusive cognitions, perceptual distortions, and dissociations. The (...) relationship between GTP, involuntary phenomena without game content in terms of, e.g., hallucinations and perceptual distortions, and game-biased perceptions, as well as the positive and negative impact of GTP and level of distress were also examined. The data were collected using a survey. Separate confirmatory factor analyses of the dimensions of “inner intrusions/misperceptions,” “outer intrusions/distortions,” and “dissociations/mix-ups” produced acceptable fit indices. The findings show that phenomena manifesting as internal experiences are more common, while those manifesting as externalized intrusions are less common. Correlations between the GTP dimensions, INVWG, and GBPA, such as the insertion of game elements in thoughts, perceptions, and dreams, supported convergent validity. The correlations between the GTP dimensions and hours played supported criterion validity. Distress was correlated with outer intrusions and dissociations/mix-ups, but not with inner intrusions. Taken together, these results support the validity and reliability of the proposed assessment of GTP constructs. (shrink)

The emergence of shared symbol systems is considered to be a pivotal moment in human evolution and human development. These changes are normally explained by reference to changes in people's internal cognitive processes. We present 2 experiments which provide evidence that changes in the external, collaborative processes that people use to communicate can also affect the structure and organization of symbol systems independently of cognitive change. We propose that mutual‐modifiability—opportunities for people to edit or manipulate each other's contributions—is a key (...) constraint on the emergence of complex symbol systems. We discuss the implications for models of language development and the origins of compositionality. (shrink)

This paper addresses relations between memory and imagery in expert sport in relation to visual or visuospatial perspective. Imagining, remembering, and moving potentially interact via related forms of episodic simulation, whether future- or past-directed. Sometimes I see myself engaged in action: many experts report switching between such external visual perspectives and an internal, 'own-eyes', or field perspective on their past or possible performance. Perspective in retrieval and in imagery may be flexible and multiple. I raise a range of topics for (...) empirical research on perspective and visualization. (shrink)

In this paper, I first introduce the main motivations for the internalism/externalism dichotomy in epistemology and explore different accounts of epistemic justification, mostly externalist, arising from Dretske’s relevant alternatives theory of knowledge, namely the reliabilism of Goldman and Nozick, the contextualism of Cohen and DeRose, which is governed by fallibilist standards, and Lewis’ version of contextualism, to which infallibilist standards apply. I then argue that Wittgenstein critically anticipates many of these strategies and tries to avoid such a dichotomy by assuming (...) a form of infallibilism which is neither internal nor external. After introducing the idea of a Wittgensteinian hinge epistemology and how it responds to the problem of epistemic justification and to the particular challenge posed by radical scepticism, I defend the view that infallibility is logically unavoidable when we realize that we are always trapped in one language-game or another, even if we constantly switch between language-games. (shrink)

Designing complex products involves working with uncertainties as the product, the requirements and the environment in which it is used co-evolve, and designers and external stakeholders make decisions that affect the evolving design. Rather than being held back by uncertainty, designers work, cooperate and communicate with each other notwithstanding these uncertainties by making assumptions to carry out their own tasks. To explain this, the paper proposes an adaptation of Kendall Walton’s make-believe theory to conceptualise designing as playing games of (...) make-believe by inferring what is required and imagining what is possible given the current set of assumptions and decisions, while knowing these are subject to change. What one is allowed and encouraged to imagine, conclude or propose is governed by socially agreed rules and constraints. The paper uses jet engine component design as an example to illustrate how different design teams make assumptions at the beginning of design activities and negotiate what can and cannot be done with the design. This often involves iteration – repeating activities under revised sets of assumptions. As assumptions are collectively revised, they become part of a new game of make-believe in the sense that there is social agreement that the decisions constitute part of the constraints that govern what can legitimately be inferred about the design or added to it. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophers, Carers, and Psychodramatic GamesCorinne Gal (bio), Alexandre Chapy (bio), Marielle Fau (bio), and Muriel Guaveia (bio)Dear Jonathan D. Moreno,Thank you for the honor of taking the time to comment on the work we do. It is very meaningful for us to be able to talk with you.We, too, see a big difference between philosophers and carers (in the broadest sense) who deal with the suffering of patients and (...) try to find methods to help them. But, if theory is at the service of the clinic, it becomes a formidable asset to refine our therapeutic methods and better understand what is happening to our patients.Indeed, patients suffering from psychosis, severe neurosis … are difficult to accompany and “recalcitrant to therapy by word alone” to use your terms. It is on this point that Ludwig Binswanger distanced himself from psychoanalysis. Binswanger ran a sanatorium in Switzerland (the Bellevue Clinic) and took in patients suffering from this type of psychological pathology. Aware that “the divan” and the analysis of the transference (unconscious) made little progress, he sought other ways of understanding his patients. The work of Edmund Husserl, the founder of the phenomenological movement, and then the work of Martin Heidegger1 fascinated him because they attempted to answer fundamental questions about being. The patients we work with ask themselves and us the same question: What is being? How can we feel existence within ourselves? Binswanger then created daseinsanalysis as an analysis of existence in which he was able to develop, among other dimensions, what he called “artists’ gestures,” including the possibility of (physical) contact with the patients. The body regained existential importance in the therapy.There are also strong similarities between psychiatric phenomenology and the work of Jacob Levy Moreno (2014, p. 214). We would like to quote your work: “ Nonetheless, there were links between them. Heidegger and J.L. shared preoccupation with personal authenticity and meaning [End Page 230] just enough to be considered part of the trends that led to postwar existentialism and fueled the new humanistic psychology, NTL, and encounter groups.”Jacob Levy Moreno’s working methods are much more powerful, allowing us to work as closely as possible with bodily feelings, since the body involved in the action is so present in psychodrama. Because, to this question of being posed by our patients, is linked the body as a felt, sensing body: the body that I am (which differs from the object body). Schizophrenic patients often express, and this is a terrible suffering, that they no longer feel anything, that they no longer feel they exist, that they no longer feel emotions or feelings. They do not know how to be in the world and with others. For us it is a fundamental symptom, as much as hallucinations. We link it to the loss of natural evidence (Blankenburg, 1991), the loss of contact with reality (Minkowski, 1929). Most of the time, in psychodrama, we “externalize” what the patients feel in different roles played by players, which allows us to work at the heart of each person’s difficulties in interaction. Trained in psychodrama by Anne Ancelin Schützenberger, we have to our credit a set of techniques to support the expression of psychodramatic play, a sort of “toolbox.” Depending on the context, the moment of the patient, our own state, we open our toolbox and try to choose and use the technique that best fits the needs of the game, of what we understand about the difficulty of the protagonist or the group. We do not do anything systematic, we are craftsmen. We have chosen to present a very simple game, without any technique used, except for the initial soliloquy, with a stabilized patient suffering from paucisymptomatic forms of schizophrenia. This is to demonstrate how the possibility of encounter, constitutive of existence, is a fundamental dimension of psychodrama.We thank you for the examples you have given us, they will be a source of inspiration and will fill our toolbox.To John Nolte:We thank you very much for your comments which honor us.The aim of the article was to present how the encounter in... (shrink)

People do not behave strictly so as to maximize monetary payoffs in ex- perimental games such as Public Goods and Ultimatum games. To explain this ‘anomaly’, behavioural economists have proposed so-called social pref- erence models that try to capture other-regarding preferences as additional arguments of players’ util- ity functions. However, none of the proposed model has successfully ex- plained data across different games. I give a proper diagnosis to this situa- tion by examining Woodward’s methodological critique of (...) the social preference approach. I argue that the problem lies not in external validity as Woodward argues, but internal validity of those experiments. Specifically, I defend the one-shot design as a useful paradigm as long as it is internally valid. (shrink)

Levels of trust and trustworthiness have important externalities for the society. But what exactly do these social concepts reflect? Building upon the argument that in typical real-life social exchanges people act simultaneously as both trustors and trustees, we study the impact of individuals’ social motives (or preferences) on their choices in a dual-role Trust Game (TG). We employ data from a large-scale representative experiment (N = 774), where all subjects played both roles of a binary TG with real monetary incentives. (...) Subjects’ social motives were inferred using their decisions in a Dictator Game and a dual-role Ultimatum Game. Next to self-interest and strategic motives we consider preferences for altruism, spitefulness, egalitarianism and efficiency. We demonstrate that there exists considerable heterogeneity in motives in the TG. Most importantly, among individuals who choose to trust as trustors, social motives can differ dramatically as there is a non-negligible proportion of them who seem to act out of (strategic) self-interest whereas others are driven more by efficiency considerations. Subjects’ elicited trustworthiness, however, can be used to infer such motivations: while the former are not trustworthy as trustees, the latter are. We discuss that research on trust can benefit from adding the second player’s choice in TG designs. (shrink)

Ultimate is a competitive team sport that is played, even at the highest level of competition, without external referees. The key to Ultimate as a self-refereed sport is the so-called ‘Spirit of the Game’. As this paper aims to show, the Spirit of the Game closely resembles Habermas’s theory of communicative action. This suggests that Habermas’s theory might be used to spell out the philosophical presuppositions of the Spirit of the Game. Most importantly, the requirements for players to serve as (...) referees of their own game specified in the ‘Rules of Ultimate’ turn out to be reformulation of the four validity claims of communicative action. Moreover, the Spirit of the Game can be interpreted as aiming towards facilitating real-life decision-making procedures that resemble as much as possible Habermas’s concept of an ideal speech situation. On the other hand, Ultimate might serve as a case study for exploring how Habermas’s idea of rational deliberation works in the practice of a competitive sporting environment. Most importantly, it makes manifest that self-refereeing is a trust-based system. This suggests that communicative rationality can only unfold its power—the unforced force of the better argument—within a context in which participants trust that everyone participates in good faith towards the common goal of finding the best decision. Hence, investigating the case of Ultimate allows us to draw broader conclusions about the requirements for rational deliberation to work in practice. (shrink)

The importance of applying game theory to the evolution of information in the presence of noise has recently become widely recognized. This Special Issue addresses the theme of spontaneously emergent order in both classical and quantum systems subject to external noise, and includes papers directly related to game theory or the development of supporting techniques. In the following editorial overview we examine the broader context of the subject, including the tension between the destructive and creative aspects of noise, and foreshadow (...) the significance of some of the subsequent papers in the volume. (shrink)

The importance of applying game theory to the evolution of information in the presence of noise has recently become widely recognized. This Special Issue addresses the theme of spontaneously emergent order in both classical and quantum systems subject to external noise, and includes papers directly related to game theory or the development of supporting techniques. In the following editorial overview we examine the broader context of the subject, including the tension between the destructive and creative aspects of noise, and foreshadow (...) the significance of some of the subsequent papers in the volume. (shrink)

A fundamental problem in game theory is the possibility of reaching equilibrium outcomes with undesirable properties, e.g., inefficiency. The economics literature abounds with models that attempt to modify games in order to avoid such undesirable properties, for example through the use of subsidies and taxation, or by allowing players to undergo a bargaining phase before their decision. In this paper, we consider the effect of such transformations in Boolean games with costs, where players control propositional variables that they (...) can set to true or false, and are primarily motivated to seek the satisfaction of some goal formula, while secondarily motivated to minimise the costs of their actions. We adopt preparation sets as our basic solution concept. A preparation set is a set of outcomes that contains for every player at least one best response to every outcome in the set. Prep sets are well-suited to the analysis of Boolean games, because we can naturally represent prep sets as propositional formulas, which in turn allows us to refer to prep formulas. The preference structure of Boolean games with costs makes it possible to distinguish between hard and soft prep sets. The hard prep sets of a game are sets of valuations that would be prep sets in that game no matter what the cost function of the game was. The properties defined by hard prep sets typically relate to goal-seeking behaviour, and as such these properties cannot be eliminated from games by, for example, taxation or subsidies. In contrast, soft prep sets can be eliminated by an appropriate system of incentives. Besides considering what can happen in a game by unrestricted manipulation of players’ cost function, we also investigate several mechanisms that allow groups of players to form coalitions and eliminate undesirable outcomes from the game, even when taxes or subsidies are not a possibility. (shrink)

A series of studies in experimental philosophy have revealed that people blame others for foreseen negative side effects but do not praise them for foreseen positive ones. In order to challenge this idea, also called the Knobe effect, we develop a laboratory experiment using monetary incentives. In a game-theoretic framework we formalize the two vignettes in a neutral way, which means that we abstain from the use of any specific language terms and can easily control and vary the economic parameters (...) of the situation. We confirm the Knobe effect in one situation and present situations in which the effect vanishes or even reverses. Our results are in line with a theoretical approach where the assessment of intention is not based on the action itself but on the underlying motive – as modelled in Levine. (shrink)

We study a first-price auction preceded by a negotiation stage with complete information, during which bidders may form a bidding ring. We prove that in the absence of externalities, the grand cartel forms in equilibrium, allowing ring members to gain the auctioned object for a minimal price. However, identity-dependent externalities may lead to the formation of small rings, as often observed in practice. Potential ring members may condition their participation on high transfer payments as a compensation for their expected externalities (...) if the ring forms. The cartel may therefore profitably exclude these bidders, although risking tougher competition in the auction. We also analyze ring efficiency in the presence of externalities, showing that a ring may prefer sending an inefficient member to the auction, if the efficient member exerts threatening externalities on bidders outside the ring, which in turn leads to a higher winning price. (shrink)

We present a well-defined generalisation of the core to coalitional games with externalities, where the value of a deviation is given by an endogenous response, the solution (if nonempty: the core) of the residual game.

Generative art theory involves any artistic practice where an artist uses external systems (rules, algorithms, organic processes) to complete an artwork. Commonly utilized in video game design, gen...

Game theorists assume that rational defensibility is a necessary condition for moral, social, or political justification. By itself, this is a fairly uncontroversial claim; most moral or political philosophers would agree. And yet game theorists tend to be advocates of the free market. External critics of game theory usually claim this is because game theorists assume that individuals are atomistic and self-interested. Game theorists themselves deny this, however, for what strike us as good reasons. In principle, game theory has no (...) necessary ties to right-wing distribution schemes. Why, then, is game theory almost exclusively the province of conservative philosophers, political scientists, and economists? The problem, we believe, lies in the theory of rational choice standardly employed by game theory. Even if we accept, for the purposes of argument, game theory's account of the justification of moral dispositions — that a disposition is morally justified if and only if, in its absence, it would be game theoretically rational to acquire it — we need not be led to right-wing solutions. If we expand the kinds of choices facing individuals to include choices about what we will call ‘institutional roles,’ then we can explain the game theoretic rationality of the kinds of emotions and behavior exemplified by duty, loyalty, and love. (shrink)

Pedagogical description and reflection upon an activity focusing on the use of a questioning game to display epistemological uncertainty and the impact of a possible Cartesian evil demon on the game’s players’ ability to come to have knowledge.

Banks have an important social responsibility to serve the real economy and to maintain financial stability, and they also need to be responsible to borrowers and others. Against the backdrop of the COVID-19 pandemic affecting the global economy and increasing financial risks, it is particularly important for banks to assume social responsibilities. This study theoretically analyzed the outstanding applicability of stakeholder governance theory. Using a two-stage game method, the optimal pressure intensity of the social responsibility stakeholders was calculated, and the (...) dynamic performance of shareholders was deduced. We found that the establishment of the social responsibility stakeholder governance mechanism will prompt the bank to fulfill its social responsibilities; rational social responsibility stakeholders will not lead to poor bank management due to excessive behavior; and shareholders with social responsibility can self-consciously choose the investment projects with lower negative externalities. The conclusions can be summarized as follows: The participation of stakeholder and the establishment of the social responsibility function of the board of directors can help promote a bank's social responsibility performance. This work studied the social responsibility of banks from the new perspective of stakeholder governance, expands the theoretical boundaries, and puts forward relevant suggestions to enhance the application value of this research. (shrink)

This book, first published in 1991, offers an integrative approach to the study of formal models in the social and behavioural sciences. The theory presented here unifies both the representation of the social environment and the equilibrium concept. The theory requires that all alternatives that are available to the players be specified in an explicit and detailed manner, and this specification is defined as a social 'situation'. A situation, therefore, not only consists of the alternatives currently available to the players, (...) but also includes the set of opportunities that might be induced by the players from their current environment. The theory requires that all recommended alternatives be both internally and externally stable; the recommendation cannot be self-defeating and, at the same time, should account for alternatives that were not recommended. In addition to unifying the representation and the solution concept, the theory also extends the social environments accommodated by current game theory. (shrink)

Esports are a rapidly growing phenomenon and understanding of factors underlying game performance are therefore of great interest. The present study investigated the influence of satisfaction of basic psychological needs (competence, autonomy, and relatedness), type of motivation (amotivation, external regulation, introjected regulation, identified regulation, integrated regulation, and intrinsic motivation), and number of matches played (time on task) on individuals’ performance on a matchmaking rating (MMR) in the video game Defence of the Ancients 2 (Dota 2). Collected data from 315 participants (...) was included in the analyses. A web-based questionnaire was used to collect data and structural equation modelling (SEM) was performed to analyze the data. The results show that perceived competence and autonomy were the only significant predictors of MMR performance beyond matches played. Fulfillment of relatedness, as well as motivational factors, were not found to be predictors of MMR scores. The strong effect of matches played, used as proxy of time on task, emphasize the effect of time and practice as a critical aspect of video-game expertise. (shrink)

This paper examines methods for narrating consciousness in game theory. In order to represent how players process their environment, posture towards one another, and hold themselves accountable to their own thinking, I find two distinct ways that game theorists narrate the consciousness of their players. Quoted monologue is a player’s internal language, which can be articulated to show a player’s perspective to the reader. The other narrative mode is psycho-narration, which puts the external technical skills of the game-theorist into the (...) narrator’s hands to describe a player’s mental activity with more complexity than quoted monologue. Quoted monologue and psycho-narration communicate players’ thoughts in ways that convince the readers of the players’ positions, clarify game solution concepts, and enliven the written text. (shrink)

This paper examines methods for narrating consciousness in game theory. In order to represent how players process their environment, posture towards one another, and hold themselves accountable to their own thinking, I find two distinct ways that game theorists narrate the consciousness of their players. Quoted monologue is a player’s internal language, which can be articulated to show a player’s perspective to the reader. The other narrative mode is psycho-narration, which puts the external technical skills of the game-theorist into the (...) narrator’s hands to describe a player’s mental activity with more complexity than quoted monologue. Quoted monologue and psycho-narration communicate players’ thoughts in ways that convince the readers of the players’ positions, clarify game solution concepts, and enliven the written text. (shrink)

Slight absolute changes in the Shanghai Stock Exchange Index (SHSE) corresponded to the city’s immediate increases in coronary heart disease deaths and stroke deaths. Significant fluctuations in the Shenzhen Stock Exchange Index (SZSE) corresponded to the country’s minor, delayed death rates. Investors deal with money, greed, stock volatility, and risky decision-making. Happy people live longer and better. We ask the following question: Who are the investors with the highest and most sustainable stock happiness, and why? Monetary wisdom asserts: Investors apply (...) their deep-rooted values (avaricious love-of-money aspiration and locus of control, Level 2) as a lens to frame critical concerns in the proximal-immediate (Shanghai Stock Exchange Index changes, Level 1) and the omnibus-distal contexts (domicile: city vs. country, Level 2) to maximize expected utility (portfolio changes, Level 1) and ultimate serenity (stock happiness, Level 1). We collected multilevel data—the longitudinal SHSE and 227 private investors’ daily stock happiness and portfolio changes for 36 consecutive trading days in four regions of China. Investors had an average liquid asset of $76,747.41 and $54,660.85 in stocks. This study is not a “one-shot” game with “nothing at stake.” We classified Shanghai and Beijing as the city and Shenzhen and Chongqing as the country. Our cross-level 3-D visualization reveals that regardless of SHSE volatility, investors with low aspiration, external control, and country domicile enjoy the highest and most sustainable stock happiness with minimum fluctuations. Independently, investors with low aspiration, external control, and country domicile tend to make fewer portfolio changes than their counterparts. Behaviorally, less is more, debunking the myth—risky decisions excite stock happiness. Our longitudinal study expands prospect theory, incorporates attitude toward money, and makes robust contributions to behavioral economics and business ethics. We help investors and ordinary citizens make happy, healthy, and wealthy decisions. Most importantly, the life you save may be your own. (shrink)

The functioning of a subject in a changing environment is most effective from the point of view of survival if the subject can form, maintain and use internal representations of the external world for decision-making. These representations are also called reflection in a broad sense. Using it, one can win in reflexive games since an internal representation of the enemy allows predicting their future moves. The goal is to assess the reflexive potential of heuristic model objects – artificial neural (...) networks – in the reflexive games “Even-Odd” (or “Matching pennies”) and “Rock-Paper-Scissors”. We used homogeneous fully connected neural networks of small sizes (from 8 to 45 neurons). Games were played between neural networks with different configurations and parameters (size, step size for modifying weight coefficients). A set of reflexivity criteria is presented, corresponding to different levels of consideration: neuronal, behavioral, formal. The transitivity of formal success in the game is shown. The most successful configurations, however, may not meet other criteria of reflexivity. We hypothesize that the best compliance with the criteria and, as a consequence, universal success in reflection tasks is achievable for heterogeneous configurations with a structure in which the formation of hierarchical systems of attractors is possible. (shrink)

We study by means of a laboratory experiment the role of individuals’ empathy in the Vote-with-the-Wallet Game. Our main purpose is to analyze the impact of the ability to empathize on participants’ behavior when asked to choose between two specific types of product: a cheaper conventional good and a more expensive one which, however, produces a positive externality for the other participants. We consider three manipulations: a) a redistribution mechanism where the expensive product is subsidized by the buyers of (...) the cheaper one; b) a framed version of the game where the expensive good is described as produced by a socially responsible company; c) a treatment where information about other participants’ behavior are made public. We find that all the manipulations increase the rate of contribution to the public good with respect to the baseline treatment and that the effects are stronger among participants who show higher levels of empathy. (shrink)

Summary The presentation will proceed as follows: (§ 3:) For the truth of an affirmative present‐tensed proposition Boethius required that its terms have actual referents, he would not accept any uninstantiated essence as a verifier. He also denied that any proposition about corruptible beings can be strictly necessary. He thus had a problem explaining how a theorem of one of the natural sciences differs from an ordinary contingent proposition. His rejection of uninstantiated essences also (§ 4) raised the question how (...) words can stay significant independently of the existence of referents, and more generally, to which degree language mirrors external reality. After a sketch of his solution to the semantic problems, § 5 returns to the question about scientific propositions. It is claimed that the core of Boethius' solution is a substitution of causal relationships for ordinary things (existents or essences) as an answer to the question what scientific knowledge is knowledge of and what scientific propositions are about. Since (§ 6) to Boethius axiomatized geometry provided the model for all sciences, consistency of a science's set of theorems should be important for him. A preoccupation with consistency can be seen in the rules he lays down for the dialogical game of “obligation” that was used as an academic exercise. An analysis (§ 7) of his description of another such game, the dialectical disputation, shows that he operated with a notion of truth‐within‐a‐game (requiring only conformity with the rules) as as opposed to absolute truth. § 8 claims that Boethius operated with a similar notion of truth‐within‐a‐science as opposed to absolute truth, and that his reason for so doing was the inaccessibility to human minds of the totality of causes. Doing science, then, (§ 9) is much like participating in a scholastic disputational game, and there may be scientifically‐true theorems conflicting with absolute truth known through revelation. § 10 epilogizes about Boethius' views about the highest good. (shrink)

The functioning of a subject in a changing environment is most effective from the point of view of survival if the subject can form, maintain and use internal representations of the external world for decision-making. These representations are also called reflection in a broad sense. Using it, one can win in reflexive games since an internal representation of the enemy allows predicting their future moves. The goal is to assess the reflexive potential of heuristic model objects – artificial neural (...) networks – in the reflexive games “Even-Odd” (or “Matching pennies”) and “Rock-Paper-Scissors”. We used homogeneous fully connected neural networks of small sizes (from 8 to 45 neurons). Games were played between neural networks with different configurations and parameters (size, step size for modifying weight coefficients). A set of reflexivity criteria is presented, corresponding to different levels of consideration: neuronal, behavioral, formal. The transitivity of formal success in the game is shown. The most successful configurations, however, may not meet other criteria of reflexivity. We hypothesize that the best compliance with the criteria and, as a consequence, universal success in reflection tasks is achievable for heterogeneous configurations with a structure in which the formation of hierarchical systems of attractors is possible. (shrink)

In strategic situations, agents base actions on knowledge and beliefs. This includes knowledge about others’ strategies and preferences over strategy profiles, but also about other external factors. Bernheim and Pearce in 1984 independently defined the game theoretic solution concept of rationalizability, which is built on the premise that rational agents will only take actions that are the best response to some situation that they consider possible. This accounts for other agents’ rationality as well, limiting the strategies to which a particular (...) agent must respond, enabling further elimination until the strategies stabilize. We seek to generalize rationalizability to account not only for actions, but knowledge of the world as well. This will enable us to examine the interplay between action based and knowledge based rationality. We give an account of what it means for an action to be rational relative to a particular state of affairs, and in turn relative to a state of knowledge. We present a class of games, Epistemic Messaging Games, with a communication stage that clarifies the epistemic state among the players prior to the players’ actions. We use a history based model, which frames individual knowledge in terms of local projections of a global history. With this framework, we give an account of rationalizability for subclasses of EMG. (shrink)

This paper analyzes the core of cooperative games generated by asymmetric aggregative normal-form games, i.e., games where the payoff of each player depends on his strategy and the sum of the strategies of all players. We assume that each coalition calculates its worth presuming that the outside players stand alone and select individually best strategies. We show that under some mild monotonicity assumptions on payoffs, the resulting cooperative game is balanced and has a non-empty core. Our paper (...) thus offers an existence result for a core notion which is frequently encountered in the theory and applications of cooperative games with externalities. (shrink)

Active participation closely associates with the sustainable operation of co-creation communities. Different from recent studies on the promotion of sustainable operation by identifying the internal and external motivations of user participation, this paper aims to analyze the mechanism regarding how different motivations affect the decision of user participation from group-level perspective. To better understand the mechanism, internal and external motivations are, respectively, captured by return-cost analysis and user interactive network. Afterwards, a network evolutionary game model was formulated to analyze the (...) dynamic strategy selection of all users. In addition, the stable equilibrium and evolutionary path of strategies are analyzed through computational experiments. Results indicate the following: Rewards have an influence on the promotion of active participation. However, with the continued growth of rewards, this promotion does not make sense sustainably. The promotional effect of information noise on the selection of active participation can be found when passive participation is the dominant strategy. However, the inhibitory effect can be seen in populations that mainly adopt active participation. The scale-free feature of user interactive network inhibits the selection of active participation when active participation is the dominant strategy in populations. Results found here is beneficial for managers to implement the specified policies and thus to achieve the sustainability of co-creation community. (shrink)

In the context of propositional logics, we apply semantics modulo satisfiability—a restricted semantics which comprehends only valuations that satisfy some specific set of formulas—with the aim to efficiently solve some computational tasks. Three possible such applications are developed.We begin by studying the possibility of implicitly representing rational McNaughton functions in Łukasiewicz Infinitely-valued Logic through semantics modulo satisfiability. We theoretically investigate some approaches to such representation concept, called representation modulo satisfiability, and describe a polynomial algorithm that builds representations in the newly (...) introduced system. An implementation of the algorithm, test results and ways to randomly generate rational McNaughton functions for testing are presented. Moreover, we propose an application of such representations to the formal verification of properties of neural networks by means of the reasoning framework of Łukasiewicz Infinitely-valued Logic.Then, we move to the investigation of the satisfiability of joint probabilistic assignments to formulas of Łukasiewicz Infinitely-valued Logic, which is known to be an NP-complete problem. We provide an exact decision algorithm derived from the combination of linear algebraic methods with semantics modulo satisfiability. Also, we provide an implementation for such algorithm for which the phenomenon of phase transition is empirically detected.Lastly, we study the game theory situation of observable games, which are games that are known to reach a Nash equilibrium, however, an external observer does not know what is the exact profile of actions that occur in a specific instance; thus, such observer assigns subjective probabilities to players actions. We study the decision problem of determining if a set of these probabilistic constraints is coherent by reducing it to the problems of satisfiability of probabilistic assignments to logical formulas both in Classical Propositional Logic and Łukasiewicz Infinitely-valued Logic depending on whether only pure equilibria or also mixed equilibria are allowed. Such reductions rely upon the properties of semantics modulo satisfiability. We provide complexity and algorithmic discussion for the coherence problem and, also, for the problem of computing maximal and minimal probabilistic constraints on actions that preserves coherence.prepared by Sandro Márcio da Silva Preto.E-mail: [email protected]:https://doi.org/10.11606/T.45.2021.tde-17062021-163257. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Richard Shusterman T. S. ELIOT ON READING: PLEASURE, GAMES, AND WISDOM Eliot frequently speaks of poetry as essentially a game or amusement whose first and foremost function is to give pleasure. "The poet," says Eliot, "would like to be something of a popular entertainer... would like to convey die pleasures ofpoetry.... As things are, and as fundamentally they must always be, poetry is not a career but a (...) mug's game" (TUPTUC, p. 154). ' Surely much ofthe point and appeal ofthese remarks is their deflationary contrast to the overlofty claims made for poetry since romanticism, claims which continue to be heard in Arnold's ideas of poetry as criticism of life and surrogate of religion and which extend to modernism with Richards's claim that "poetry is capable of saving us." In mordant debunking of the poet's putative status as world legislator, prophet, and savior, Eliot says he would be pleased to secure for the poet "a part to play in society as worthy as that of the music hall comedian." But Eliot's idea of poetry as an amusement or game is much more than an ironic rhetorical ploy against romantic attitudes. It contains a positive and complex view of what poetry is and how it satisfies. Eliot wants to remind us of "that simple truth that literature is primarily literature, a means of refined and intellectual pleasure."2 However, he also realizes that this truth is really not all that simple to understand or elucidate properly; for it does not mean (though it might seem to suggest ) that literature is a mere means to obtain some external end of pleasure. Nor does it mean that in aiming essentially at pleasure, literature is confined to satisfying our sensual or emotional faculties, and is 2 Philosophy and Literature therefore not significandy connected with improving thought or communicating wisdom, for the pleasure is described as intellectual pleasure. Because of the likely misunderstandings that it is apt to provoke, Eliot's claim that literature is a refined game, that "poetry is a superior amusement," is not confidendy offered as an adequately "true definition, but because if you call it something else, you are likely to call it something still more false" (SW, p. ix). But what substance or value is there in Eliot's preferred view? The idea of poetry as a superior game or amusement is developed in many ways throughout the Eliot critical corpus. We cannot consider them all, but the first we should consider concerns the character of pleasure or enjoyment derived from poetry. If poetry is a refined game, and since games are activities, the pleasure (enjoyment) of poetry would be that ofan activity rather than that ofa pleasant sensation. Eliot's idea of poetic pleasure is thus fundamentally Aristotelian.3 Such pleasure is not a separate sensation or pleasant feeling external to and identifiable apart from the game played, but rather represents the attendant zest or satisfaction with which the game is played or the activity pursued. For Aristotle, "pleasure completes the activity" by the dual and reciprocal action of making it more rewarding and thus promoting it. Our pleasure intensifies our interest in the activity which makes us better pursue it, while displeasure conversely impedes it, as does submitting to the alien pleasures from other activities. If the pleasures of different activities can conflict and impede their respective activities, then these pleasures must be distinguishable and are so in terms of the activities to which they attend. Our enjoyment of an activity thus logically depends on the constitutive structure of that activity and is inseparable from it. We therefore distinguish the pleasures of different games by the different game-activities to which they are bound. One may enjoy tennis, cricket, and football and perhaps feel similar pleasurable sensations from each. But the enjoyment of each game is clearly distinguishable and understood not in terms of these sensations but in terms of the different activities which constitute the formal object or ground of that pleasure. Different games or, more generally, different activities are differendy enjoyable, and each has what Aristotle calls its own "proper pleasure." One could not get the pleasure of playing tennis from playing... (shrink)