共查询到20条相似文献,搜索用时 93 毫秒
1.
冯燕红 《数学的实践与认识》2014,(9)
针对官员腐败现象,从经济学的视角出发,在信息不对称条件下展开分析,基于斯宾塞的劳动力模型弓l入信号传递模型的建立廉洁声誉信号博弈模型.通过分析,得出官员选择存在逆向选择问题的结论,并进一步研究了分离精炼贝叶斯均衡及其影响.在分离均衡范围一定存在的情况下,建立财产公示制度、加强监督、提高查处力度以及高薪养廉对策能配合模型系统地提高反腐效果. 相似文献
2.
3.
研究全支付拍卖模型中参与人的参与结构以及均衡问题.首先给出了非对称信息下参与人的参与选择问题,分析了异质参与人的参与选择. 尔后给出了参与人参与均衡策略,给出当参与人估价分布函数在对称和非对称情形时, 竞赛中的对称均衡策略.最后给出了当均衡存在时, 竞争对手对均衡分布函数的估计. 相似文献
4.
《数学物理学报(A辑)》2010,(5)
研究全支付拍卖模型中参与人的参与结构以及均衡问题.首先给出了非对称信息下参与人的参与选择问题,分析了异质参与人的参与选择.尔后给出了参与人参与均衡策略,给出当参与人估价分布函数在对称和非对称情形时,竞赛中的对称均衡策略.最后给出了当均衡存在时,竞争对手对均衡分布函数的估计. 相似文献
5.
6.
《数学的实践与认识》2020,(11)
在网络供需都不确定的情况下,提出一个考虑路段关联的路径选择模型.假定网络中每一用户的路径选择效用受到三个因素的影响:出行时间均值、出行成本均值和以出行时间方差表现的出行时间可靠性.在出行路径选择效用最大化前提下,修改了出行阻抗单调可分的常见假设,考虑出行阻抗非单调且不可分的情形,建立了模型的均衡公式和约束条件.探讨了模型解的存在性和唯一性特征,并将之表示为一个非线性互补问题,研究非线性互补问题的解得到结论:其唯一性不保证.最后用一个小型网络进行测试来表现模型的特征,测试结果表明出行阻抗的非单调、不可分性质通过影响出行时间方差来影响网络均衡流分配,造成均衡路段和路径阻抗的增加. 相似文献
7.
8.
《数学的实践与认识》2013,(20)
在知识服务网络中,知识供应方和知识需求方在传递知识的过程中进行着重复博弈,并根据收益矩阵选择有利策略逐渐模仿,最终采用某个策略达到了演化稳定均衡状态.首先,根据演化博弈理论,建立了知识服务网络的复制动态演化博弈模型.然后,采用多智能体建模仿真方法及Netlogo仿真平台对所建模型进行仿真分析.最后,通过仿真分析得到在不同的初始情况下,知识主体最终的演化稳定策略与各主体中采取合作策略的初始比例和鞍点的大小关系有关,验证了所建立模型的正确性. 相似文献
9.
以大型连锁卖场的选址为研究背景,提出了一个在竞争环境下使获利最大的竞争选址定价双层规划模型,其中上层模型做出选址决策,下层模型确定产品的纳什均衡价格.将设施效用引入到模型中,用指数效用函数来刻画顾客的购物行为偏好,首次证明了不合作状态下双方价格均衡解的存在性和唯一性,并给出了求解最优设施点设置方案和价格均衡解的算法思想及数值算例. 相似文献
10.
《数学的实践与认识》2015,(8)
石油价格是影响粮食价格走势的重要因素,将传统的误差修正模型(ECM)改进,并加入农业生产资料价格作为石油价格向粮食价格传递的中间变量,分析了石油价格和农资价格在上涨和下跌阶段对粮食价格传递的非对称性,此外还对石油价格与粮食价格间的传导效率和传导强度进行实证检验.研究结果表明:石油价格、农资价格和粮食价格之间存在长期均衡关系,石油和农资价格下降要比价格上升更快速和完全的传递给粮食价格;石油价格向粮食价格的传导存在滞后,石油价格的增长不会快速放大粮食价格变化. 相似文献
11.
12.
In -Koo Cho 《International Journal of Game Theory》1993,22(2):107-121
This paper extends selection rules now used in the signaling literature (such as the Intuitive Criterion of Cho and Kreps (1987)) to a class of repeated signaling games, where each player can exchange the messages conditioned on his private information. STABAC (STAbility and BACkward induction) is defined as a procedure whereby forward induction arguments (Kohlberg and Mertens (1986)) are applied in combination with the backward induction process. We specify the conditions under which any strategically stable outcome of a repeated signaling game includes an equilibrium that induces a stable equilibrium outcome in every subform, whence STABAC does not eliminate any stable outcome of the repeated signaling game. 相似文献
13.
Jiang Jifa 《数学年刊B辑(英文版)》1993,14(2):165-174
This paper is concerned with the asymptotic behavior of cooperative systems in $W\subset R^n$. For a $C^2$ cooperative system whose Jacobian matrices are irreducible, it is proved that the forward orbit converges to an equilibrium for almost every point having compact forward orbit closure and the set of all points which have compact forward orbit closures and do not converge to a semi-asymptotically stable equilibrium is meager in W if the equilibrium set cannot contain a simply ordered curve. The invariant function and the geometry of the stable manifold of an unstable equilibrium are considered. 相似文献
14.
We compare two alternative mechanisms for capping prices in two-settlement electricity markets. With sufficient lead time, forward market prices are implicitly capped by competitive pressure of potential entry that will occur when forward prices rise above some backstop price. Another more direct approach is to cap spot prices through a regulatory intervention. In this paper we explore the implications of these two alternative mechanisms in a two-settlement Cournot equilibrium framework. We formulate the market equilibrium as a stochastic equilibrium problem with equilibrium constraints (EPEC) capturing congestion effects, probabilistic contingencies and horizontal market power. As an illustrative test case, we use the 53-bus Belgian electricity network with representative generator costs but hypothetical demand and ownership structure. Compared to a price-uncapped two-settlement system, a forward cap increases firms’ incentives for forward contracting, whereas a spot cap reduces such incentives. Moreover, in both cases, more forward contracts are committed as the generation resource ownership structure becomes more diversified. 相似文献
15.
模糊环境下带有平衡条件的投资项目评估与选择决策方法 总被引:1,自引:0,他引:1
文章提出在模糊环境下求解带有平衡条件的投资项目评估与选择问题的决策方法。该方法由模糊综合评价系统和项目选择的模糊整数规划模型两部分组成。其中模糊综合评价系统采用三角模糊数来描述决策人对项目的主观评价以及多个评价因素的综合,而模糊整数规划模型则描述了各种不同门类利益之间的平衡。最后以实例说明该方法的应用。 相似文献
16.
《Optimization》2012,61(12):2269-2295
ABSTRACTIn this paper, we propose a best-response approach to select an equilibrium in a two-player generalized Nash equilibrium problem. In our model we solve, at each of a finite number of time steps, two independent optimization problems. We prove that convergence of our Jacobi-type method, for the number of time steps going to infinity, implies the selection of the same equilibrium as in a recently introduced continuous equilibrium selection theory. Thus the presented approach is a different motivation for the existing equilibrium selection theory, and it can also be seen as a numerical method. We show convergence of our numerical scheme for some special cases of generalized Nash equilibrium problems with linear constraints and linear or quadratic cost functions. 相似文献
17.
Wendi Wang 《Acta Appl Math》2014,132(1):649-661
The mathematical model is proposed to simulate the dynamics of rabies transmissions in the raccoon population where juveniles stay with their mother and become adults until they establish their own habitats. The basic reproduction number of rabies transmission is formulated and is shown to be a threshold value of disease invasion. The bifurcation direction from the disease-free equilibrium is proved to be forward when the basic reproduction number passes through unity for spatial homogenous environment. The global stability of the disease-free steady state is also studied. 相似文献
18.
Dessalegn Y. Melesse 《Journal of Mathematical Analysis and Applications》2010,366(1):202-860
The paper presents a rigorous mathematical analysis of a deterministic model, which uses a standard incidence function, for the transmission dynamics of a communicable disease with an arbitrary number of distinct infectious stages. It is shown, using a linear Lyapunov function, that the model has a globally-asymptotically stable disease-free equilibrium whenever the associated reproduction threshold is less than unity. Further, the model has a unique endemic equilibrium when the threshold exceeds unity. The equilibrium is shown to be locally-asymptotically stable, for a special case, using a Krasnoselskii sub-linearity trick. Finally, a non-linear Lyapunov function is used to show the global asymptotic stability of the endemic equilibrium (for the special case). Numerical simulation results, using parameter values relevant to the transmission dynamics of influenza, are presented to illustrate some of the main theoretical results. 相似文献
19.
20.
In this paper we study a stochastic epidemic model of vector-borne diseases with direct mode of transmission and its delay modification. More precisely, we extend the deterministic epidemic models by introducing random perturbations around the endemic equilibrium state. By using suitable Lyapunov functions and functionals, we obtain stability conditions for the considered models and study the effect of the delay on the stability of the endemic equilibrium. Finally, numerical simulations for the stochastic model of malaria disease transmission are presented to illustrate our mathematical findings. 相似文献