海峡两岸休闲农业合作相关主体行为的博弈分析

随着海峡两岸休闲农业合作的逐步发展，各相关主体之间的博弈也逐渐显现。在此过程中，涉及的主要行为主体有地方政府、农户以及台商企业。文章从各主体的利益行为分析出发，构建并分析政府与台商企业、台商企业与农户之间的动态博弈。分析表明：在博弈的过程中，政府处于主动和有利的地位，但其存在不规范行为；台商企业基于趋利的本性，在与政府之间的博弈会展开“寻租”行为，在与农户之间的博弈以牺牲农户的利益来实现其收益最大化；农户与台商企业的博弈相对处于弱势地位，加之其有限理性和知识能力有限，自身利益难以得到保障；为实现各主体利益最大化的可持续发展，应建立健全相关法律法规；完善政府的服务职能；构建合理的利益分配形式。     

民国时期特种教育在凉山彝区的组织与活动

民国时期，部分彝族子弟求生存和谋发展的愿望被国民党军统组织所利用，他们以招收成都军校学生为幌子，在“乐西公路”筑训班采取貌似自愿报名的公开方式，通过精挑细选和隐瞒真实信息等手段，将不明真相的彝族学员带到重庆，送入国民党中央警官学校特种警察训练班，企图培养具有跨文化能力的地方军政协助人。但受特定时间、空间、文化的影响，军统机构在彝区的组织、活动基本尚未成熟即夭折。梳理和呈现这一史事，能让读者从一个特殊视角了解民国时期所谓“独立倮倮”与汉区，乃至与中国以外的世界之间实际存在千丝万缕，或直接或间接的复杂联系；看到在对于制度的顺从与抗争和身份的认同等方面，彝人个体实际仍有主观能动的余地。由此，提示读者理解中国内地边疆“中间圈”的彝区在现代化进程中之曲折经历，包括当事人的博弈策略及后果。     

基于碳减排技术的竞争供应链投资均衡策略研究

本文以两条竞争供应链（每条供应链均包含一个制造商和一个零售商）为研究对象，基于其是否采用碳减排技术，构建了两条供应链均不采用碳减排技术（NN情景）、供应链1采用碳减排技术（AN情景），供应链2采用碳减排技术（NA情景），及两条供应链均采用碳减排技术（AA情景）的收益模型，求解出相应的最优解并探讨了竞争供应链投资碳减排技术的均衡策略。研究发现：当碳税较低时，AA情景是竞争供应链的均衡策略；当碳税适中时，生产成本较高的供应链不采用减排技术，而其竞争供应链将采用减排技术以提升竞争力；当碳税较高时，NN情景是竞争供应链的均衡策略。此外，当供应链间竞争强度较弱时，政府可适当提高碳税标准；当供应链间竞争较为激烈时，政府应降低碳税以引导企业采用碳减排技术。     

Defender–Attacker Games with Asymmetric Player Utilities

The presence of strategic attackers has become an important factor in the security and protection of systems, especially since the 9/11/2001 attacks, and considerable efforts have been dedicated to its study. When defending against the strategic attacker, many existing studies assume that the attacker would seek to minimize the defender's utility, which implies that the defender and attacker have symmetric utilities. However, the attacker's objective is determined by its own valuation of the system and target of the attack, which is not necessarily consistent with the defender's utility. If the attacker unexpectedly targets a different utility, then the defense strategy might no longer be optimal. In particular, the defense strategy could be inferior if the attacker's utility is not known to the defender. This study considers a situation where the defender's utility is the system survivability and the attacker's utility is the expected number of destroyed elements in the system. We investigate possible attack strategies under these two different utilities and compare (a) the conservative defense strategy when the attack utility is unknown to the defender with (b) the optimal defense strategy when the attack utility is known to the defender. We show that the conservative protection strategy is still optimal under asymmetric utilities when the contest intensity is smaller than one.     

A Shiny Update to an Old Experiment Game

ABSTRACT

Games can be a powerful tool for learning about statistical methodology. Effective game design involves a fine balance between caricature and realism, to simultaneously illustrate salient concepts in a controlled setting and serve as a testament to real-world applicability. Striking that balance is particularly challenging in response surface and design domains, where real-world scenarios often play out over long time scales, during which theories are revised, model and inferential techniques are improved, and knowledge is updated. Here, I present a game, borrowing liberally from one first played over 40 years ago, which attempts to achieve that balance while reinforcing a cascade of topics in modern nonparametric response surfaces, sequential design, and optimization. The game embeds a blackbox simulation within a shiny app whose interface is designed to simulate a realistic information–availability setting, while offering a stimulating, competitive environment wherein students can try out new methodology, and ultimately appreciate its power and limitations. Interface, rules, timing with course material, and evaluation are described, along with a “case study” involving a cohort of students at Virginia Tech. Supplementary materials for this article are available online.     

形式与意义:儿童文学作品中的游戏精神

儿童文学的"游戏精神"主要是指在儿童作品文本中体现出的、通过人物游戏所传递的一种符合儿童心理需求和审美旨趣,并实现儿童内心愿望的精神。周作人认为儿童文学的游戏精神是"幻想精神""愉悦精神"和"自由精神"。儿童文学游戏精神具有快乐性、幻想性和自由性的三性特征"。游戏精神"在儿童文学中作品的主要呈现形式为:通过"顽童""小大人""、反派"等人物形象的塑造凸显游戏精神;通过故事情节蕴涵的笨拙与聪明、嬉笑与吵闹、虚拟与真实凸显游戏精神;通过语言夸张凸显荒诞美、语言颠倒凸显逆向思维、语言突转凸显惊奇,从而凸显游戏精神。游戏精神对于儿童文学作品编创的意义在于:游戏精神是儿童文学的基本属性和内涵所在,新媒介时代儿童文学的发展需要延续游戏精神。因此游戏精神是儿童文学的作品编创的重要依据和准则。     

网络借贷市场参与主体行为策略的演化博弈均衡分析——基于三方博弈的视角

由于监管缺失、信用风险管理缺位，导致网络借贷市场的违约事件持续出现，损害网络借贷市场的参与者利益。本文构建了一个包括网络借贷平台、金融监管机构和投资者的网络借贷市场参与主体的三方行为策略演化博弈模型，从演化博弈的角度分析了网络借贷平台、金融监管机构和投资者的策略选择对网络借贷市场运行的影响，并以拍拍贷平台为案例进行数值模拟分析。研究结果表明：不同初始值的三方博弈结果存在显著差异，网络借贷市场参与主体行为策略的演化博弈不具有稳定中心点、且不存在稳定的均衡点。另外，当金融监管机构采取"严格监管"措施时，惩罚值越高，网络借贷平台越倾向于选择"自律"的行为策略，随着投资者投资额度的增加，网络借贷平台选择"自律"行为策略的概率逐渐降低。最后，提出规范网络借贷市场参与者行为和风险控制的对策建议。     

Security Investment in Contagious Networks

Security of the systems is normally interdependent in such a way that security risks of one part affect other parts and threats spread through the vulnerable links in the network. So, the risks of the systems can be mitigated through investments in the security of interconnecting links. This article takes an innovative look at the problem of security investment of nodes on their vulnerable links in a given contagious network as a game‐theoretic model that can be applied to a variety of applications including information systems. In the proposed game model, each node computes its corresponding risk based on the value of its assets, vulnerabilities, and threats to determine the optimum level of security investments on its external links respecting its limited budget. Furthermore, direct and indirect nonlinear influences of a node's security investment on the risks of other nodes are considered. The existence and uniqueness of the game's Nash equilibrium in the proposed game are also proved. Further analysis of the model in a practical case revealed that taking advantage of the investment effects of other players, perfectly rational players (i.e., those who use the utility function of the proposed game model) make more cost‐effective decisions than selfish nonrational or semirational players.     

医疗信息共享对患者转移数量和服务质量水平影响研究

当前我国医院间存在严重的"信息孤岛"，医院参与医疗信息共享意愿不高，患者的诊疗信息被静态碎片化储存而无法充分有效地利用。考虑到医院进行医疗信息共享将降低患者转移成本，本文构建一个多阶段双寡头动态博弈模型研究医疗信息共享对医院竞争过程中患者转移数量和服务质量水平决策的影响。首先，根据是否存在转移成本，将患者分为新患者和经验性患者，借助Hotelling模型刻画患者的效用函数，分析患者就诊决策。然后，在政府价格规制和不考虑医院利他性情景下，构建了医院累积期望收益目标函数，使用动态规划方法，求解实现医院累积期望收益最大化的服务质量水平，获得了实现患者相互转移且医院在市场中共存的马尔可夫完美均衡。最后，根据医院参与医疗信息共享后患者转移成本降为零，分析与比较信息共享前后患者转移数量和服务质量水平变化。研究发现：在不同医院间本身存在患者转移背景下，医院参与信息共享后，患者转移数量增加但存在一个上限，增加的转移量与患者在医院间的转移成本呈正相关，与初始感知效用的差值范围呈负相关；医院参与信息共享后，均衡状态下的医院服务质量水平高于信息共享前的服务质量水平。因此，在不改变当前医保支付方式下，要加快推进医疗信息共享，政府部门可以根据医院的患者数量和服务质量水平变化对其进行定期补贴，以激励医院积极参与医疗信息共享，本文给出了这个补贴的量化表达。     

三重螺旋视角下我国制造业关键共性技术协同创新的演化博弈仿真分析

文章基于三重螺旋理论视角,引入政府对制造业关键共性技术协同创新的激励及惩罚机制,构建制造业企业、学研机构和政府的演化博弈模型,探讨演化路径、稳定策略及影响因素,并用Matlab仿真模拟。研究发现:制造业企业和学研机构从协同创新中获得收益越大,协同所需投入成本越小,双方越趋于协同,额外收益和初始成本足以使双方协同,因此无需政府过多干预;反之,政府需积极反应,政府资金支持与惩罚力度越大,制造业企业、学研机构越趋于协同创新。