考虑消费者预期的电动汽车分时租赁市场价格竞争模型

分时租赁平台作为电动汽车推广的主要方式，其特征与打车软件类似，在风险资本的推动下极易引发价格战。各租车公司的市场需求量不仅与自己的定价有关，也与竞争对手的定价策略相关，目标都是各自利润的最大化。本文在考虑消费者预期的基础上，研究了需求函数为线性情形下的多人博弈，证明了此博弈是超模博弈以及Nash均衡的存在性和唯一性。并进一步揭示了降价幅度、交叉价格和价格敏感消费群体占比对均衡价格、均衡需求量和利润的影响关系，讨论了价格竞争过程中各租车公司的决策过程与利弊关系。结果表明：任意租车公司的降价行为都会引发整个市场的降价反应，且降价幅度随着博弈阶段的推进逐渐减小，最终收敛于均衡价格；动态定价博弈存在最优组合策略，市场竞争时应当把握好降价幅度，避免过度的价格竞争；均衡价格是关于消费者预期的单调减函数，价格敏感的消费群体占比越大，租车公司间价格竞争越激烈，降价幅度会越大，均衡价格越低；对于市场份额大的租车公司利润是关于价格敏感型消费者占比的单调增函数，但对中小租车公司而言则是单调减函数，价格敏感的消费者越多，对大公司有利，对中小公司不利。     

Building a mutually beneficial partnership to ensure backup supply

In today׳s complex global environment, it is very important for a firm to possess backup supply resource when facing unpredictable disruptions from its primary supply resource. To ensure the actual arrival of backup supply in cases of primary supply disruptions, a purchasing firm needs to work with its backup supplier to forge a strong partnership that not only protects itself, but also assures the backup supplier׳s economic benefit. In this research, we establish the structure of such a partnership based on real business practices. The interactions between the purchasing firm and the backup supplier are examined through a decision-tree approach that takes disruption situations at all levels into consideration. We then design the backup supply contract, find the Nash equilibrium contract parameters, and identify the critical conditions under which such a contractual partnership will be valuable. The contract parameters we find are functions of the moments of the demand distribution, which are independent of specific demand distributions and are easy to be estimated in practice. Our numerical tests support our theoretical results and demonstrate the robustness of the contract with respect to various demand distributions.     

多要素流动、内生产业空间波动与经济地理新均衡——基于新经济地理学自由企业家模型的比较研究

促进新经济地理学理论的发展，不仅要根据理论要求的逻辑完美性修改假设，更为重要的是，要根据空间经济发展的现实修改模型的假设条件。由此，在研究上突破了新经济地理学模型单一生产要素流动假设的局限性，认为企业家与普通劳动者在地区间都可以流动，并且，普通劳动者在行业间也可以自由流动。与新经济地理学可解的经典模型——自由企业家模型相比，新的可解中心-外围模型丰富了新经济地理学的研究结论，发展了新的理论观点：突破点与持续点的大小比较存在三种关系。随着贸易自由度的变化，产业空间结构的演化除了棒棒均衡的结果外，不仅可能出现内部非对称结构为稳定均衡的情形，也可能出现内部非对称结构与中心-外围结构稳定均衡共存的情形，而不仅仅是对称结构与中心-外围结构稳定均衡共存的情形；随着贸易自由度的提高，工业品支出份额的增加，工业品间替代弹性的降低，会引起产业空间的稳定结构由对称结构向非对称结构转化；一旦产业空间结构演化的“黑洞条件”得到满足，则产业空间的稳定结构只能是内部非对称结构或中心-外围结构，而不仅仅是中心-外围的稳态结构。     

Moral values and increasing stakes in a dictator game

Using data from a large representative US sample (N = 1519), we compare hypothetical moral fairness values from the Moral Foundations Sacredness Scale with actual fairness behavior in an incentivized dictator game with either low or high stakes. We find that people with high moral fairness values fail to live up to their high fairness standards, when stake size increases. This violates principles from consistency theories according to which moral values are supposedly aligned with moral behavior, but is in line with temptation theories that question the absoluteness of morality values.     

A Framework for Analyzing the Economic Tradeoffs Between Urban Commerce and Security Against Terrorism

This article presents a framework for economic consequence analysis of terrorism countermeasures. It specifies major categories of direct and indirect costs, benefits, spillover effects, and transfer payments that must be estimated in a comprehensive assessment. It develops a spreadsheet tool for data collection, storage, and refinement, as well as estimation of the various components of the necessary economic accounts. It also illustrates the usefulness of the framework in the first assessment of the tradeoffs between enhanced security and changes in commercial activity in an urban area, with explicit attention to the role of spillover effects. The article also contributes a practical user interface to the model for emergency managers.     

我国成品油流通行业市场进入的博弈分析

利用博弈理论分析我国成品油流通市场，发现：适度的、透明的市场进入固定成本对整个市场结构是有利的；要使成品油流通市场更有效率，并保护各方利益，政府应鼓励流通领域竞争，并更大限度地发挥市场配置资源的基础性作用，从而逐渐形成合理有效的市场结构。     

Knowledge and opinions of families regarding games—Toy selection for 6 to 12 year old children (the case of Northern Cyprus)

Games and toys are irreplaceable basic needs of children of almost every age. They are also some of the most significant traces of culture. Some of our games and toys lost their original functions, and it is not remembered why they were functionally significant in Turkish Cypriot culture. Families and cultural identity also play a major role regarding different factors leading to changes in toy selection. The purpose of this study is to explore the knowledge and opinions of families regarding games and, in particular, toy selection for 6–12 year old children of Turkish Cypriot families. A survey was administered to 100 households in North Cyprus, and was used as a data collection tool. It was found that the most important factors in the selection of children’s games and toys were (1) the economic opportunities, and (2) children’s desires for toys after seeing them with their friends. A considerable number of families in Northern Cyprus see game-toy selection as important in a child’s social, psychomotor, mental, and cultural construction. Families, especially those living with difficulties, indicated that they cannot afford enough time to encourage playing traditional games. Although new versions of traditional games and toys are being developed and used, it is seen that educated and high-income families are more conscious about the importance of having information about them than others.     

土地征收进程中不同参与主体行为研究

城镇化进程中农民集体所有土地转变为城市国有土地,在该过程中产生大量的土地增值收益。地方政府、用地企业、村委会和农民在土地增值收益分配中有不同的行为表现,其根本原因在于利益分配冲突。从不同主体行为角度对土地增值收益分配中利益冲突问题进行研究,有利于探讨利益冲突背后的原因并提出有针对性的政策建议。     

Inventory and transshipment decisions in the rationing game under capacity uncertainty

In this paper, we consider the inventory decisions of two retailers who are supplied by a single supplier with uncertain capacity. When capacity is allocated in proportion to the retailers׳ orders, the retailers compete for the capacity by inflating their orders (i.e., the rationing game). In addition, we allow the retailers to implement transshipment between them such that they cooperate by transshipping the surplus stock of one to another who is out of stock. Our analysis of Nash equilibrium orders shows that, while order inflation in the equilibrium orders persists in the rationing game with transshipment, it may not occur if the amount of capacity shortage is small and the transshipment prices are low. Thus, carefully chosen transshipment prices may alleviate order inflation behavior. We also characterize centralized orders that maximize the total profit of the retailers and compare them to equilibrium orders. In particular, we investigate coordinating transshipment prices that induce the retailers to choose centralized orders. Our numerical analysis shows that, even for two identical retailers, coordinating transshipment prices exist in a more limited range of parameter values in the rationing game than they do outside the rationing game due to capacity uncertainty and limitation.     

Defender–Attacker Decision Tree Analysis to Combat Terrorism

We propose a methodology, called defender–attacker decision tree analysis, to evaluate defensive actions against terrorist attacks in a dynamic and hostile environment. Like most game‐theoretic formulations of this problem, we assume that the defenders act rationally by maximizing their expected utility or minimizing their expected costs. However, we do not assume that attackers maximize their expected utilities. Instead, we encode the defender's limited knowledge about the attacker's motivations and capabilities as a conditional probability distribution over the attacker's decisions. We apply this methodology to the problem of defending against possible terrorist attacks on commercial airplanes, using one of three weapons: infrared‐guided MANPADS (man‐portable air defense systems), laser‐guided MANPADS, or visually targeted RPGs (rocket propelled grenades). We also evaluate three countermeasures against these weapons: DIRCMs (directional infrared countermeasures), perimeter control around the airport, and hardening airplanes. The model includes deterrence effects, the effectiveness of the countermeasures, and the substitution of weapons and targets once a specific countermeasure is selected. It also includes a second stage of defensive decisions after an attack occurs. Key findings are: (1) due to the high cost of the countermeasures, not implementing countermeasures is the preferred defensive alternative for a large range of parameters; (2) if the probability of an attack and the associated consequences are large, a combination of DIRCMs and ground perimeter control are preferred over any single countermeasure.