A dual description of the class of games with a population monotonic allocation scheme

A vector of balanced weights infers an inequality that games with a nonempty core obey. This paper gives a generalization of the notion ‘vector of balanced weights.’ Herewith, it provides necessary and sufficient conditions to determine whether a TU-game has a population monotonic allocation scheme or not. Furthermore, it shows that every four-person integer valued game with a population monotonic allocation scheme has an integer valued population monotonic allocation scheme and it gives an example of a seven-person integer valued game that has only noninteger valued population monotonic allocation schemes.     

Socially Subjective Equilibrium in Strategic Form Games

This study provides a new framework and a new equilibrium concept, which are able to describe the situation where people have various images of the society and have various solution concepts for social outcomes, and where people accept the social outcomes. In socially subjective equilibrium, people have a coherence of their own norms in two senses. One is the consistency of the norm itself. Imagined outcomes should satisfy a certain (subjective) solution concept. The other is the consistency between the imagined outcomes and realized one. These are the main features of our equilibrium concept. This paper forms a part of my doctoral thesis, which is titled “On socially subjective equilibrium”. The first person I would like to thank is my direct supervisor Professor Ken Urai (Osaka University). I obtained a basic idea of the main concept of my doctoral thesis, that is, the solution concept scheme, from Professor Urai. I am grateful to Professor Hiroaki Nagatani (Osaka University) and Professor Ken-Ichi Shimomura (Kobe University), who monitored my works and took efforts in providing me with valuable comments on earlier versions of my thesis. I also obtained a fruitful advice from Professor Kenichi Amaya (Kobe University). Lastly, I specially thank to Kozo Shiraishi (Osaka University).     

基于Shapley模型的KTV音乐版权费征收策略

在KTV中收取音乐版权费可以激发音乐人的创作热情,推动我国文化产业蓬勃发展。然而这涉及到唱片公司、音乐著作人、KTV场所经营者等多方面的利益,将版权费在多个主体间进行合理分配成为当务之急。本文基于合作博弈论中的Shapley模型,对当前我国KTV音乐版权费用的征收方式进行了分析。结合当前存在的问题提出了"版权费与经营收益挂钩,版权费按Shapley模型分配"的解决方式,既保证了KTV经营者、消费者的利益,又能将版权费用在音乐著作权人之间进行合理分配。为解决Shapley模型的缺陷,本文基于具体问题,提出了"贡献因子"、"渴望函数"、"意愿因子"等概念,对原始Shapley模型进行加权改进,并结合具体案例对模型进行了解释与验证。最后对模型的应用进行了评价,并提出进一步的研究方向。     

结构化多人博弈的分析框架

结构化多人博弈是一种把博弈方嵌入到具体的社会关系之中,在两两博弈的基础上求解整体博弈均衡状态的分析框架。和现有的合作博弈(Cooperative Game Theory)、网络博弈(Network Games)、进化图论(Evolutionary Graph Theory,EGT)、计算博弈论(Computational Game Theory)等多人博弈分析框架相比,结构化博弈既有和它们相似的地方,也有非常重要的差别。结构化博弈更适合用来分析政治问题和社会现象中的多人博弈局面。作为最简单的情况,本文先给出了一个三人结构化博弈的一般分析框架,然后根据这个分析框架对传统的联盟博弈进行了新的分析,发现经典的"三人分300元"博弈事实上有稳定的均衡解,即三人各分100元。作为一个简单的应用,文章分析了三个国家之间的"战争-同盟博弈",我们发现该博弈有两个稳定的均衡解,在这两个稳定的均衡解中,超级大国和小国总是选择结盟,而小国总是选择和地区大国进行战争。从这两个例子可以看出,结构化多人博弈在分析复杂的政治、经济、社会问题上具有传统博弈论方法所不具备的很多优势,其获得的均衡解也更符合社会实际。     

Fair allocation in networks with externalities

I prove existence and uniqueness of a component efficient and fair allocation rule when the value of the network is allowed to exhibit any type of externalities across its components. This is done by means of a new specification of the value function, generalizing partial results appearing in Myerson [Myerson, R.B., 1977a. Graphs and cooperation in games. Math. Operations Res. 2, 225–229], Feldman [Feldman, B.E., 1996. Bargaining, coalition formation and value. PhD dissertation. State University of New York at Stony Brook] and Jackson and Wolinsky [Jackson, M.O., Wolinsky, A., 1996. A strategic model of social and economic networks. J. Econ. Theory 71, 44–74]. This component efficient and fair allocation rule is found closely related to an extension of the Shapley value to TU-games in partition function form proposed by Myerson [Myerson, R.B., 1977b. Values of games in partition function form. Int. J. Game Theory 6 (1), 23–31].     

Endogenous fluctuations under evolutionary pressure in Cournot competition

An evolutionary game theoretic model of Cournot competition is investigated. Individuals choose from a finite set of different behavioral rules. Each rule specifies the quantity to be produced in the current period as a function of past quantities. Using more sophisticated rules may require extra information costs. Based upon realized payoffs, the fractions of the population choosing a certain behavioral rule are updated according to the replicator equation with noise. The long-run behavior of the evolutionary system consisting of the population dynamics coupled with the quantity dynamics of the Cournot game may be complicated and endogenous fluctuations may arise. We consider a typical example where firms can choose between two rules: the Nash rule and the best-reply rule. We show that a homoclinic tangency between the stable and unstable manifold of the equilibrium occurs as evolutionary pressure increases, implying bifurcation routes to complicated dynamics and strange attractors.     

潜规则对会计准则制度变迁的演化博弈分析

会计准则变迁是一种动态演化博弈,强调的是一种动态均衡。会计准则制定过程实际就是利益各方实现动态均衡的过程。潜规则在我国经济改革和制度转轨方面起着重要作用,本文基于演化博弈论分析框架,分析了潜规则对会计准则演化博弈的影响,认为初始条件和当前状态对会计准则的产生和演化有着重要作用。     

一带一路背景下基础设施PPP项目风险分担研究

一带一路PPP项目面临着巨大的风险,项目成功与否的决定性因素是风险的合理分担,不合理的风险分担会影响项目参与者的积极性,有损项目整体收益。在PPP项目风险分担原则的基础上,将风险分为自担风险和共担风险,运用随机合作博弈模型确定双方共担风险的分担比例。通过建立一带一路PPP项目风险分担模型,实现一带一路PPP项目最优风险策略组合。     

基于法律风险损失的研究：CPA与客户之间的合作博弈

CPA与客户之间的合作关系因法律风险进而影响到审计质量,基于法律风险损失的视角,对CPA与客户之间的合作博弈进行重复博弈分析。结果表明：在法律风险损失足够大的情况下,CPA与客户各自理性的选择应是相互再合作,即CPA履行职责,客户提供真实的信息,从而提高审计质量。因此,规避法律风险损失对提高审计质量有积极作用,对我国相关法律政策也具有一定的借鉴意义。     

石油合同对国际油气合作博弈影响分析

本文建立了国际油气合作中的资源国与消费国之间的合作博弈模型,分析了不同的油气合同模式对资源消费国效用水平的影响.研究表明,合同模式在油气合作博弈中扮演着重要角色.从投资者的角度看,为获得效用最大化,投资者不但应注意投资区块的选择,还要对资源国的合同模式进行深入分析和利弊权衡.通过对几种石油合同模式的比较,发现在总收益相同的条件下,从风险大小的角度考虑,纯服务合同带来的效用大于产品分成合同和矿税制合同;从收益的角度考虑,产品分成合同和矿税制合同使资源消费国保留了油价上涨时获取高额利润的权利,带来的效用大于技术服务合同.     

Globalization, intellectual property, and economic prosperity

Innovation and the adoption of new ideas is fundamental to economic progress, and so is free trade of goods and services. Here we examine the underlying economics of the market for ideas and its implications for trade. From a positive perspective, we examine how such markets function and how international trade interact with them. From a normative perspective, we examine the pitfalls of current intellectual property regulations, and how might they be improved. We highlight recent research by ourselves and others challenging the notion that government awards of monopoly through patents and copyright are "the way" to provide appropriate incentives for innovation. JEL Classification: X15, X16 This article is based on the text of the SER Invited Lecture delivered by Michele Boldrin at the 2003 Simposio de Análisis Económico (Seville). We thank National Science Foundation Grants SES 01-14147 and 03-14713 for financial support. Corresponding author: Michele Boldrin     

Walras and Darwin: an odd couple?

General equilibrium theory and the evolutionary branches of economics and game theory take rather opposite positions in the spectrum covered by the economic science. However, we reveal and explore analogies between Darwinian dynamics and Walrasian tatonnement processes for pure exchange economies, as well as further analogies implied by these.     

基于博弈论的企业品牌战略决策分析

博弈思维的全面导入,为企业品牌战略决策提供了重要的理论依据。由“非合作性博弈”向“合作性博弈”转换是当今国际市场主流发展趋势,市场主导企业与非主导企业结成品牌合作联盟,实施品牌合作战略,可以有效抵制外来企业的入侵,达到“双赢”的目的。     

战略联盟的存在机理及其生命周期管理

战略联盟是企业间以价值链为纽带,以核心能力为基础展开的同盟搏弈.国内外学者对战略联盟的解释多借助于价值链理论、交易费用理论、博弈论和网络战略理论.尽管学界对战略联盟的生命周期少有论及,但作为“市场化组织”,战略联盟与其他生物体一样,具有自己的生命周期.论文根据战略联盟演绎进程和阶段性工作重点的差异,将其分为酝酿与组建期、震荡与磨合期、规范运作与联盟任务执行期以及联盟的解散与“升华”四个阶段,各阶段工作中心不同,风险存在差异.战略联盟具有“竞合”性质,联盟成员间合作博弈和非合作博弈共存.联盟成员的机会主义和欺诈悖德行为贯穿联盟始终,危及联盟存续,所以要提高联盟绩效,就必须加强联盟生命周期不同阶段的风险管理.     

建设人口均衡城市视角下的人口规模预测——以成都市为例

建设人口均衡城市,首要在于充分摸清人口底数,准确预测人口增长规模,才能科学制定人口和经济社会发展规划。文章针对以往单一指标预测人口总量精度不高的问题,利用灰色预测所需信息少和神经网络非线性映射能力强的优点,筛选出与人口总量紧密联系的9个主要因素,力图建立多指标灰色PSO-BP神经网络人口预测模型,并对2015年至2030年成都市人口总量进行预测。实证分析表明,该模型预测精度高、泛化能力强,具有较好的实用价值。在论文的最后,作者依据模型预测结果,为成都市建设人口均衡城市提出了较有针对性的建议。     

Behavior and Learning in the “Dirty Faces” Game

This paper examines the Dirty Faces problem as a Bayesian game. The equilibrium in the general form of the game requires the extreme assumption of common knowledge of rationality. However, for any finite number of players, the exact number of steps of iterated rationality necessary for the equilibrium to arise depends on the number of players of a particular type, allowing the game to be used to bound the number of steps satisfied by actual players. The game differs from other games used to study iterated rationality in that all players are better off when common knowledge of rationality is satisfied. While behavior in experiments is inconsistent with the game-theoretic prediction at the group level, individual level behavior shows a greater degree of consistency with theory and with previous results on iterated rationality. Finally, there is some evidence of learning in repeated play.     

An evolutionary theory of the convergence towards low inflation rates

This paper presents an evolutionary interpretation of Barro-Gordons monetary policy game. The model describes a multi-country setup where governments and private agents are boundedly rational players. The behavioral rule of players decisions leads to the imitation of the strategy giving the highest payoff. In this evolutionary monetary policy game, we show how a low inflation state is reached from an international context dominated by inflationary policies. The analysis explains the convergence towards low inflation rates observed during the past twenty years. Moreover, the low inflation state appears to be the long-run equilibrium of the game under some conditions featuring the observed macroeconomic context.JEL Classification: E5, C72, C73 Correspondence to: A. dArtigues