期权博弈的分类及其在不完全信息下的均衡策略研究

期权博弈的分类与均衡策略研究是进行期权博弈模型研究,为企业在不同的竞争性投资实践中提供科学决策的基础与根本。首先从实物期权的种类和竞争特性出发对期权博弈进行了分类与界定。然后,在不完全信息条件下,重点研究了占优型实物期权博弈均衡策略。无论是在高成本或低成本类型下,占优型企业均会以低成本的身份选择最佳投资时机和最佳垄断产量进入市场生产、成为市场的领导者;在观察到领导者行动策略的基础上,追随者按实物期权方法的投资决策基本规则确定其进入市场的最佳投资时机;随后,领导者与追随者按照精炼贝耶斯纳什均衡产量进行生产,共同获得市场均衡收益。     

Correlated Equilibrium in Stochastic Games

We study the existence of uniform correlated equilibrium payoffs in stochastic games. The correlation devices that we use are either autonomous (they base their choice of signal on previous signals, but not on previous states or actions) or stationary (their choice is independent of any data and is drawn according to the same probability distribution at every stage). We prove that any n-player stochastic game admits an autonomous correlated equilibrium payoff. When the game is positive and recursive, a stationary correlated equilibrium payoff exists. Journal of Economic Literature Classification Numbers: C72, C73.     

Strong Equilibrium in Congestion Games

[6]introduced the class of congestion games and proved that they always possess a Nash equilibrium in pure strategies. Here we obtain conditions for the existence of a strong equilibrium in this class of games, as well as for the equivalence of Nash and strong equilibria. We also give conditions for uniqueness and for Pareto optimality of the Nash equilibrium. Except for a natural monotonicity assumption on the utilities, the conditions are expressed only in terms of the underlying congestion game form. It turns out that avoiding a certain type of bad configuration in the strategy spaces is essential to positive results.Journal of Economic LiteratureClassification Numbers: C71, C72, D62.     

Financing Higher Education: A General Equilibrium Public Choice Approach*

A public choice approach is used to examine the level of a tax-financed grant chosen by a cohort, allowing for a wide range of interdependencies, including the goverment's budget constraint The existence of an externality is necessary, but not sufficient, for support of a grant It is shown that a majority voting equilibrium exists. Comparative static analyses are carried out using a minimum of assumptions about the structure of the model An increase in government expenditure for non-higher education purposes is associated with an increase in the preferred grant while an increase in private returns to education reduces the grant     

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).     

Minimum-Effort Coordination Games: Stochastic Potential and Logit Equilibrium

This paper revisits the minimum-effort coordination game with a continuum of Pareto-ranked Nash equilibria. Noise is introduced via a logit probabilistic choice function. The resulting logit equilibrium distribution of decisions is unique and maximizes a stochastic potential function. In the limit as the noise vanishes, the distribution converges to an outcome that is analogous to the risk-dominant outcome for 2 × 2 games. In accordance with experimental evidence, logit equilibrium efforts decrease with increases in effort costs and the number of players, even though these parameters do not affect the Nash equilibria. Journal of Economic Literature Classification Numbers: C72, C92.     

转轨国家的机制性腐败:一个一般均衡模型

本文通过一个一般均衡模型考察腐败对经济福利，分工的网络规模以及社会生产力的影响，我们首先计算了在每个个体均可自由择业的市场经济中的瓦尔拉斯均衡。然后考察当一个特权集团被选定为高层管理者时对社会福利产生的影响；最后考虑在管理者通过其代理人而形成共谋时的情形，即机制性腐败，此时，这个代理人通过索取一笔相当于贿赂的进入费用来为管理者的利益服务，而这时的管理者服务的价格仍然由一个瓦尔拉斯市场的供给和需求决定。该模型表明腐败增加了转轨国家特权集团（包括腐败的官员以及与其密切联关的人）的福利，并以牺牲大众的利益为代价。     

人民币离岸金融中心发展模式及策略选择

发展离岸金融中心对于推进人民币国际化,为企业提供国际融资平台有着重要意义.基于层级分析法和模糊判断法对上海和新加坡离岸金融中心进行量化比较发现,上海在我国最具有发展离岸中心的优势条件,建议采用内外分离式作为发展上海离岸金融中心模式.此外,还应该加强沪港金融中心互动协作、加强离岸金融业务创新、强化离岸金融监管、完善离岸金融配套措施等配套措施.     

Working and Shirking: Equilibrium in Public-Goods Games with Overlapping Generations of Players

In overlapping-generations models of public-goods provision,in which the contribution decision is binary and lifetimes arefinite, the set of symmetric subgame-perfect equilibria canbe categorized into three types: seniority equilibria, in whichplayers contribute (effort) until a predetermined age and thenshirk thereafter; dependency equilibria, in which players initiallyshirk, then contribute for a set number of periods, then shirkfor the remainder of their lives; and sabbatical equilibria,in which players alternately contribute and shirk for periodsof varying length before entering a final stage of shirking.In a world without discounting we establish conditions for equilibriumand demonstrate that for any dependency equilibrium there isa seniority equilibrium that Pareto dominates it ex ante. Weproceed to characterize generational preferences over alternativeseniority equilibria. We explore the aggregation of these preferencesby embedding the public-goods provision game in a voting frameworkand solving for the majority-rule equilibria. In this way wecan think of political processes as providing one natural frameworkfor equilibrium selection in the original public-goods provisiongame.     

On the Generic Finiteness of Equilibrium Outcomes in Plurality Games

In this paper we prove that for generic (noncooperative) voting games under plurality rule the set of equilibria that induce a mixed distribution over the outcomes (i.e., with two or more candidates elected with positive probability) is finite and, furthermore, each of these equilibria is regular. From that we deduce the finiteness of the set of equilibrium distributions over outcomes. Furthermore we offer an example (S. Govindan and A. McLennan, 1997, “On the Generic Finiteness of Equilibrium Outcome Distributions in Game Forms,” mimeo) that shows the impossibility of extending such results to a general framework, even just to voting games. Journal of Economic Literature Classification Numbers: C72, D72.     

Existence and Uniqueness of Nash Equilibrium in Electoral Competition Games: The Hybrid Case

This paper analyzes the traditional unidimensional, two‐party electoral competition game when parties have mixed motivations, in the sense that they are interested in winning the election, but also in the policy implemented after the contest. In spite of having discontinuous payoffs, this game, referred to as the hybrid election game, is shown to be payoff secure and reciprocally upper semi‐continuous. Conditional payoffs, however, are not quasi‐concave. Hence, the existence of a pure strategy Nash equilibrium (psne ) is ensured only if parties have homogenous interests in power. In that case, an equilibrium not only exists, but it is also unique. Instead, if parties have heterogeneous motivations, depending upon the relationship between the electoral uncertainty, the aggregate opportunism, and its distribution across parties, a psne may or may not exist. The mixed extension, however, is always better reply secure. Therefore, a mixed strategy Nash equilibrium does indeed exist.     

On the Uniqueness of Equilibrium in Cournot Oligopoly and Other Games

In an average surplus sharing game, such as a Cournot oligopoly, a group of agents share a production process. Each contributes an amount of input to the process, and output is divided in proportion to the amount of input contributed. Uniqueness of the equilibrium is needed for any type of comparative static analysis. However, general uniqueness results for concave games have restrictive assumptions on preferences and technology; specifically, the conditions needed for uniqueness become more difficult to meet as the number of players increases. A new theorem for uniqueness with easily interpretable conditions is given which is independent of the number of players.Journal of Economic LiteratureClassification Numbers: C70, C72, D43.     

Supermarket Choice and Supermarket Competition in Market Equilibrium

Multi-store firms are common in the retailing industry. Theory suggests that cross-elasticities between stores of the same firm enhance market power. To evaluate the importance of this effect in the U.K. supermarket industry, we estimate a model of consumer choice and expenditure using three data sources: profit margins for each chain, a survey of consumer choices and a data-set of store characteristics. To permit plausible substitution patterns, the utility model interacts consumer and store characteristics. We measure market power by calculating the effect of merger and demerger on Nash equilibrium prices. Demerger reduces the prices of the largest firms by between 2 and  3.8%  depending on local concentration; mergers between the largest firms lead to price increases up to  7.4%  .     

The Choice of Technology and Equilibrium Wage Rigidity

In this general equilibrium model, firms engage in oligopolistic competition and choose increasing returns technologies to maximize profits. Capital and labor are the two factors of production. The existence of efficiency wages leads to unemployment. The model is able to explain some interesting observations of the labor market. First, even though there is neither long-term labor contract nor costs of wage adjustment, wage rigidity is an equilibrium phenomenon: an increase in the exogenous job separation rate, the size of the population, the cost of exerting effort, and the probability that shirking is detected will not change the equilibrium wage rate. Second, the equilibrium wage rate increases with the level of capital stock. Third, a higher level of capital stock does not necessarily reduce the unemployment rate. That is, there is no monotonic relationship between capital accumulation and the unemployment rate.     

物联网发展现状及其中国发展模式的战略选择

文章基于物联网产业发展在中国经济结构转型中的作用和劳动分工理论,对物联网产业的国内外发展和当前中国物联网发展中所遇到的问题进行分析和梳理,报告了国内外物联网产业发展思路,通过采用比较分析方法和案例研究方法等,对中国物联网产业发展进行纵横两个层次、四个维度即产业发展思路、空间集群效应、规模经济性以及联结经济性方面,以及对中国物联网产业发展与其他产业相互融合的现状进行分析,如与市场经济中企业运营管理模式的融合等方面的调查,反映了中国物联网发展中遇到的主要问题,取得了阻碍目前中国物联网产业发展的主要制约因素。针对中国物联网产业发展中所遇到的主要问题即物联网产业链、技术成本、技术标准、外部不经济性等提出相应的改进措施和建议。     

有效会计监管的均衡模型

会计欺诈已经成为世界范围内的重大问题 ,它给世界经济带来了重大的负面影响。本文通过建立两阶段动态博弈模型并对其求解发现 ,会计规则执行者的违规程度与惩罚力度、执行者的贴现因子以及政府的监管概率成反比 ;而政府的会计监管力度与惩罚力度、执行者贴现因子的平方以及政府的监管成本成反比。政府的最优事后会计监管的合适目标并不是要杜绝会计规则执行者的会计欺诈行为 ,而是将部分会计规则执行者的会计欺诈行为控制在一定的范围之内 ;最优的会计监管对于控制很看中当期收益的会计规则执行者的会计欺诈行为来说无能为力 ,控制这类会计欺诈行为的唯一措施在于提高会计监管的时效性 ;有效会计监管需要额外成本 ;并且有效会计监管实施的基本条件存在优先次序 :首先区分不同类型的会计规则执行者 ,其次区分会计规则执行者所承担的他们真正能够感知的违规处罚 ,然后才是选择最优的监管力度。     

Payoff Assessments without Probabilities: A Simple Dynamic Model of Choice

We develop a model which reflects the tendency of people to simplify the decision problems they face. The decision maker chooses among alternate strategies only on the basis of the payoff she assesses she would obtain from them, and these assessments do not explicitly take into account her subjective judgements regarding the likelihood of alternate states of the world. At each stage, the decision maker chooses the strategy that she assesses to give the highest payoff. She updates her assessments adaptively. We show that such behavior leads to maxmin choices. We also consider the decision maker who experiences shocks. Journal of Economic Literature Classification Numbers: C7, D8.     

国际制度的形式选择——一个基于国家间交易成本的模型

根据制度化水平的三个维度,国际制度安排的基本形式可分为非正式协议、自我实施的正式协议、一般的正式国际组织和超国家组织。那么,缔约国如何在上述国际制度安排形式之间进行选择?本文尝试从国家间交易成本的角度为这一问题提供一个解释模型。国家间交易成本包括国家间治理成本与国家间缔约成本两个部分。国家间治理成本随着制度化水平的提高而递减,国家间缔约成本随着制度化水平的提高而递增。缔约国在选择国际制度安排形式时,将在国家间治理成本与国家间缔约成本之间进行权衡。作为理性的国际行为主体,缔约国在交易收益给定的情况下,将选择使国家间交易成本最小化的国际制度安排形式。根据这一制度选择模型,本文进一步提出了分别涉及问题领域敏感性、国家同质性、透明度、资产专用性、不确定性和交易频率的六个假说。