均值-标准差控制下的供应链渠道Stackelberg模型

本文研究了在均值-标准差方法控制下的一个具有风险偏好(风险规避、风险中性、风险喜好)零售商与两个风险中性供应商之间供应链渠道协作和竞争。首先,在考虑零售商风险偏好下,提出了供应商联盟与非联盟两种情况中的各方处于Stackelberg-leader或Stackelberg-follower不同权利地位时各决策模式及其对应决策模型;然后,通过对比分析各决策模式最优解及深入分析零售商风险偏好对各渠道成员最优决策影响,得到了基于零售商风险偏好下的供应链渠道各成员的领导者地位将较大影响各方期望效用,而对供应链渠道整体期望效用最大化并无影响,同时,零售商过度喜好风险或者规避风险都将会对供应链整体期望效用造成致命伤害;最后,通过数值分析进一步验证了前面结论。     

不对称信息下逆向供应链定价策略分析

逆向供应链与传统供应链不同,传统供应链中的定价策略在逆向供应链中不再适用。为了解决该问题,基于单一制造商和单一零售商构成的逆向供应链系统,在对称信息和不对称信息情况下,应用博弈理论对逆向供应链中废旧产品回收的定价策略进行研究,并将两种情况下的结果进行比较分析,得出一些有价值的结论。     

财险市场价格竞争有效性研究

我国国内财产保险业务自1980年恢复以来虽然取得了很大成绩,但依旧存在较多问题,特别是市场集中度偏高,导致市场竞争长期处于低水平竞争状态。本文根据市场份额将我国财险公司划分为在位者与竞争者两类,应用Stackelberg博弈模型,对在位者与竞争者的保险价格竞争从单时期和多时期两个层次进行分析,得出在财险市场中,单纯的价格竞争是无效的,并建议从产品和服务的创新、投资、成本管理和客户信息搜集与管理四方面协助价格竞争的展开。     

Oligopoly with a large number of competitors: asymmetric limit result

We address how profitable innovation is in a competitive market by investigating the asymmetric oligopoly model in which 1 firm (innovator) has a cost advantage that is not drastic enough for her to become a monopolist, and by inducing asymmetric limit outcomes when the number of the other firms (laggard firms) goes to infinity. If the innovator is the Stackelberg leader, two cases can arise: (i) the innovator behaves as in the competitive market or (ii) she occupies the entire market but cannot make the price. If we consider Cournot competition, the innovator becomes the partial monopolist. An erratum to this article can be found at     

Optimal pollution taxation in a Cournot duopoly

It is well known that the optimal pollution tax in a competitive industry is equal to the marginal damage inflicted by the pollution. It has also been shown that the optimal pollution tax on a monopoly is less than the marginal damage. In this paper, I derive the optimal pollution tax for a Cournot duopoly. If firms have different production costs, the optimal tax rate may exceed the marginal damage. This is so because the tax may be an effective instrument for allocating production from the less to the more efficient firm. It is also shown that, if one firm has a positive most preferred pollution tax, the sum of consumer and producer surpluses will be declining in the tax at this level.     

Capacity decisions and supply price games under flexibility of backward integration

A key issue in supply chain design for manufacturing firms is how to make a trade-off between strategies of vertical integration and outsourcing. A two-echelon supply chain model with one supplier and one manufacturer is set up to study this issue. The manufacturer makes decisions on two types of capacities, one is core capacity that cannot be outsourced, the other is non-core capacity on which the manufacturer implements a strategy that includes three options—complete, partial or no outsourcing. Such a strategy is referred to as “flexibility of backward integration”. Optimal capacity decisions of the manufacturer are given and the supplier's pricing strategies are discussed. Managerial implications of partial outsourcing are investigated. The impact of the flexibility of backward integration is presented and finally, supply chain coordination is analyzed.     

Two is not too many for monopoly

Many research contributions have investigated the identity of the leader in oligopolistic markets. As a general rule, this literature points to the leader being either the most efficient, the largest or the best informed player. However, there tend to be exceptions to this rule and it is unclear who will become the leader when firms at the same time are different in size, efficiency of production and/or the quality of the information they have. The present paper reveals insights regarding this last question. As such, it points to the elements that really matter to explain for leadership when firms are different from each other in more than one respect. It turns out that the most efficient firm becomes the leader, regardless whether or not its rival has invested in more capacity. While this result tends to be in line with the previous findings regarding the identity of the leader being the relatively more efficient firm, it contradicts the dominant firm scenario regarding price leadership. This is the result of enlarging the strategy space of the players, by including a buyout option. As such, the paper provides the foundations and hence a theoretical justification for price leadership out of a collusive motive. Since a priori the model also does not exclude a barometric price leadership outcome, it is appropriate to conclude that the buyout option truly is a collusive device strong enough to suppress other reasons for price leadership. Therefore, the arrangements observed in reality aiming at the implementation of buyout possibilities have to be watched very closely from an antitrust perspective.     

PROFITABLE STRATEGIC DELEGATION WITH CONJECTURAL VARIATIONS

Firms delegate strategic decisions to managers because they find it profitable to do so. In the product market, when agents make conjectures about the reaction of their rivals to marginal changes in their own strategies, the set of equilibriums can be enlarged with respect to the case of no conjectures. This paper takes a duopolistic linear market parameterization where firms selling differentiated products can delegate either price or output decisions to managers. We show that it is a dominant strategy for firms to delegate no matter whether firms are Cournot or Bertrand competitors, although the equilibrium is not necessarily efficient. Futhermore, in equilibrium Cournot competition is more profitable for firms than Bertrand competition. Finally, requiring consistency in conjectures yields the same outcome no matter what type of strategic interaction and managerial choice there is on the part of firms.     

基于双寡头垄断模型的垄断国有企业改革分析

国有企业垄断是一个经济学问题,与所有制性质没有必然关系,需要从理性的经济学视角来审视。基于中国国情,从由国有企业构成的双寡头垄断市场出发,分析并比较由国有企业、私有企业及混合所有制企业组合而成的各种双寡头垄断市场的价格、产量及社会福利。可以发现,私有化对社会福利的提升作用是有条件的,完全的私有化未必能提升社会福利;在当前的社会经济条件下,混合所有制是解决国有企业垄断问题可行、务实的途径,其股权结构十分重要。     

基于霍特林模型的双寡头银行贷款竞价博弈

文章以银行利润最大化为目标,通过建立霍特林博弈模型研究了在我国利率市场化进程中,在线性市场情况以及完全信息情况下,不同规模、不同成本结构的双寡头银行各自的最优贷款定价与贷款风险水平选择。研究发现,当两银行贷款成本相差不大时,规模越大的商业银行的最优贷款定价越高,贷款平均风险水平也越高;此外,加强存款人对商业银行的市场约束力,可以有效降低所有银行的贷款定价水平和贷款风险水平。