环境监管中的博弈分析

通过建立环境监管问题的完全信息动态博弈模型,文章证明了在适宜的制度环境条件下,合谋可能是企业与地方政府的最优选择。针对优化制度环境,文章提出要加大来自上级政府的监督与制裁力度,改革地方政府的绩效考评制度等政策建议,以期改善地方环境状况。     

Mechanism Design under Collusion and Uniform Transfers

We study mechanism design under collusion focusing on the transaction costs in coalition formation created by asymmetric information among agents. In our setting, the regulator is constrained to use uniform transfers and this generates room for collusion between the regulated firms. We first show that when the gains from collusion are smaller than a threshold, the firms fail to realize the gains because of transaction costs. When the gains are larger than the threshold, we characterize the optimal collusion‐proof mechanism. Finally, we show that when the regulator is constrained to use uniform transfers, the collusion‐proofness principle does not hold.     

The Organizational Structure of Banking Supervision

Does it matter whether banking supervision is undertaken in‐house in the Central Bank or in a separate specialised supervisory institution? After all, bank supervisors and the Central Bank must continue to work closely together wherever the supervisors are located. Nevertheless there has been a recent trend towards hiving off bank supervision to a separate agency, as in the UK. The main driving forces are the rise of the universal bank, increased conglomeration, and concerns with conflicts of interest. Such separation, however, raises questions whether systemic stability might suffer. The ethos and culture of the separate supervisor might come to focus more on conduct of business, consumer protection, issues. Potentially systemic financial crises would have to be handled by a committee. These are qualitative issues, and developed countries, with differing historical, legal and institutional backgrounds, will come to differing conclusions. But in less developed countries, more weight needs to be placed on ensuring the quality of the supervisory staff, i.e. their professional skills, independence from external pressures, and adequate funding. This tells strongly towards retaining banking supervision under the wing of the Central Bank in such emerging countries. (J.E.L.: E5, F3, G2).     

Merger,Partial Collusion and Relocation

We set up a three-firm model of spatial competition to analyse how a merger affects the incentives for relocation, and conversely, how the possibility of relocation affects the profitability of the merger, particularly for the non-participating firm. We also consider the cases of partial collusion in either prices or locations. Under the assumption of mill pricing, we find that a merger will generally induce the merger participants to relocate, but the direction of relocation is ambiguous, and dependent on the degree of convexity in the consumers transportation cost function. Furthermore, we identify a set of parameter values for which the free-rider effect of a merger vanishes, implying that the possibility of relocation could solve the merger paradox.Acknowledgement We thank Jonathan Cave, Frode Meland, participants at the Royal Economic Society Conference 2003 and an anonymous referee for valuable comments.     

Market Segmentation, Market Integration, and Tacit Collusion

Moving from market segmentation to market integration (firms cannot discriminate among markets) is shown to have often anticompetitive effects in an infinitely repeated Cournot game. In particular, market integration between two countries leads both of them to experience anticompetitive effects when product markets are similar. The same conclusion holds when trade liberalization is modeled as a decrease in bilateral trade barriers followed by moving from market segmentation to market integration. The analysis also predicts that a less efficient country (like a country in transition) enjoys pro–competitive effects from market integration.     

Collusion, Exclusion, and Inclusion in Random-Order Bargaining

This paper examines the profitability of three types of integration in a cooperative game solved by a random-order value ( e.g. the Shapley value). Collusion between players  i  and  j  is a contract merging their resources in the hands of one of them, say  i  . This contract can be represented as a combination of exclusion, which lets  i  exclude  j  's resource but not use it himself, and inclusion, which lets  i  use  j  's resource but not exclude  j  from it. This representation yields a third-difference condition on the characteristic function that determines the profitability of collusion, generalizing existing results for specific games. Namely, collusion is profitable [unprofitable] when the complementarity of the colluding players is reduced [increased] by other players.     

国有控股公司治理中合谋防御的机制设计

本文对委托人、监督者和代理人的主体进行重新界定,并对无合谋防御机制时的情形作了分析,再针对合谋行为设计出监督者主导和委托人主导两种合谋防御机制。在监督者主导的防御机制中,委托人事前给出一组契约,授权监督者向代理人提供子契约,委托人提供的契约可使得监督者和代理人所得到的转移支付都不小于其实施合谋时的信息租金,让监督者和代理人没有激励进行合谋。在委托人主导型的防御机制中,委托人同时与监督者和代理人签订契约,如代理人谎报自己的成本类型,委托人会对代理人实施罚金,而给予监督者奖励,让监督者有动力积极履行职责,且能激励高成本类型的代理人降低生产成本。     

Collusion and Information Exchange

Antitrust authorities view that exchange of individual firms’ sales data is more anti‐competitive than that of aggregate sales data. In this paper, I survey antitrust implications of such inter‐firm information exchange. I argue that both types of information exchange are anti‐competitive under some circumstances. More precisely, I compare profits when each type of information exchange is allowed to that when firms can only observe their own sales (Stigler’s secret price‐cutting model), and the former is bigger than the latter. I also provide a general method to bound the equilibrium profits without such information exchange.     

Collusion and biased tournaments

Tournaments are vulnerable to collusion. This paper finds that biased tournaments can be more effective at preventing collusion than unbiased ones. When agents can collude to exert low effort, introducing some bias into tournaments generates opposite effects on favored and disfavored agents׳ respective incentives to exert high effort and provides strong incentives for the favored agent to deviate from collusion. Introducing an adequate degree of bias reduces the principal׳s incentive cost for preventing collusion; however, granting excessive bias instead increases the incentive cost. We show that the optimal level of bias can be endogenously determined.     

Collusion and Price Rigidity

We consider an infinitely repeated Bertrand game, in which prices are publicly observed and each firm receives a privately observed, i.i.d. cost shock in each period. We focus on symmetric perfect public equilibria, wherein any "punishments" are borne equally by all firms. We identify a tradeoff that is associated with collusive pricing schemes in which the price to be charged by each firm is strictly increasing in its cost level: such "fully sorting" schemes offer efficiency benefits, as they ensure that the lowest-cost firm makes the current sale, but they also imply an informational cost (distorted pricing and/or equilibrium-path price wars), since a higher-cost firm must be deterred from mimicking a lower-cost firm by charging a lower price. A rigid-pricing scheme, where a firm's collusive price is independent of its current cost position, sacrifices efficiency benefits but also diminishes the informational cost. For a wide range of settings, the optimal symmetric collusive scheme requires (i) the absence of equilibrium-path price wars and (ii) a rigid price. If firms are sufficiently impatient, however, the rigid-pricing scheme cannot be enforced, and the collusive price of lower-cost firms may be distorted downward in order to diminish the incentive to cheat. When the model is modified to include i.i.d. public demand shocks, the downward pricing distortion that accompanies a firm's lower-cost realization may occur only when current demand is high.     

交叉持股、共同股东与竞争企业合谋

随着竞争企业间存在交叉持股、共同股东的现象不断增加,其是否会促使企业合谋、损害竞争引发了关注和争论.本文首先构建理论模型探讨了交叉持股、共同股东对竞争企业合谋的影响.研究发现,无论竞争企业间相互持有股权,抑或是存在共同股东,投资者持有目标企业所有权或控制权份额越大,合谋越容易达成.其次对滴滴出行和Uber的并购进行了案例研究,发现滴滴出行和Uber存在股权关系后,出现了涉嫌合谋的行为,主要表现在滴滴出行和Uber涉嫌划分全球市场,各自在相关市场具有市场支配地位,并涉嫌实施垄断高价.最后本文提出了完善反垄断立法及执法的建议.     

短缺、拥挤与合谋--以铁路春运车票博弈为例

对短缺物品实行价格上限常常带来拥挤与合谋。当社会规范能够自实施时,可以有效避免拥挤的发生;否则,秩序的维持就要依赖于外部监督的力度。为防止拥挤,一方面要加强社会规范教育,另一方面还要进行有效监督。此外,价格上限的存在使得消费者的支付意愿高于实际支付价格,二者差额形成“租金”,从而成为寻租者追求的目标。为解决合谋问题,应给予寻租商、秩序维持者和资源分配执行者足够的惩罚和激励。     

Collusion and discrimination in organizations

In a principal-multi-agent setting we investigate how optimal contracts should be modified under relative performance evaluation when agents collude. Agents may write side-contracts, which are not contingent on their effort choices but indirectly control them through side-transfers. We show that the optimal collusion-proof contract is to introduce a “discriminatory policy” in the sense that the wage schemes offered to agents depend on their identities even if they are identical with respect to productive abilities. Such discriminatory wage schemes explain the organizational strategy of “divide and conquer” as an optimal response to collusion.     

Collusion in homogeneous and heterogeneous tournaments

In tournaments, only the relative performance of agents is important. Therefore, the agents have an incentive to collude by jointly deviating to low effort levels. Previous papers on collusion have proposed to make the tournament asymmetric to prevent agents from colluding. However, by allowing side payments between the agents and focusing on implicit enforcement of collusion, the current study demonstrates that this is not true. Often, the principal prefers to hire homogeneous agents to make collusions less stable.     

组织冗余-组织学习-创新意愿三维情境下的组织创新研究

文章通过对组织冗余、组织创新意愿、组织学习与组织创新组成的具有反馈强化机制的分析,建立了由组织冗余、组织创新意愿和组织学习三个情境要素构成的组织创新情境,讨论了不同创新情境下,组织创新的特点并提出了促进创新的对策。     

Incentives, Information, and Organizational Form

We model an organization as a hierarchy of managers erected on top of atechnology (here consisting of a collection of plants). In our framework,the role of a manager is to take steps to reduce the adverse consequencesof shocks that affect the plants beneath him. We argue that differentorganizational forms give rise to different information about managers'performance and therefore differ according to how effective incentives canbe in encouraging a good performance. In particular, we show that, undercertain assumptions, the M-form (multi-divisional form) is likely to providebetter incentives than the U-form (unitary form) because it promotesyardstick competition (i.e. relative performance evaluation) moreeffectively. We conclude by presenting evidence that the assumptions onwhich this comparison rests are satisfied for Chinese data.     

Collusion and group lending with adverse selection

In an environment with correlated returns, this paper characterizes optimal lending contracts when the bank faces adverse selection and borrowers have limited liability. Group lending contracts are shown to be dominated by revelation mechanisms which do not use the ex post observability of the partners' performances. However, when collusion between borrowers under complete information is allowed, group lending contracts are optimal in the class of simple revelation mechanisms (which elicit only the borrower's own private information) and remain useful with extended revelation mechanisms.     

Undominated Nash Implementation with Collusion and Renegotiation

This article looks at implementation in economic environments when agents have perfect information about the state of the world, but cannot commit not to renegotiate bad outcomes or to collude against each other. If renegotiation satisfies a weak condition of disagreement point monotonicity, then any Pareto-efficient social choice function can be implemented if there are at least three agents who play undominated Nash equilibria. The mechanism does not use modulo or integer games, has no bad mixed strategy equilibria, and is “bounded.”Journal of Economic LiteratureClassification Number: D71.     

Collusion and the organization of delegated expertise

We study the optimal design of incentive contracts for experts in different collusion environments, and explore implications for the organization of delegated expertise. We consider a principal relying on experts to gather and report two signals about a project's value. The principal can have a single expert gather both signals or two experts gather one signal each. We show that absent collusion, the multiexpert organization dominates the single expert organization. However, this ranking is reversed when the experts can collude among themselves (horizontal collusion) and with the principal (vertical collusion).     

防范政府投资项目招投标纵向串谋的机制设计

政府投资项目招标投标中的纵向串谋指的是招标人与投标人之一私下达成中标协议,然后通过虚假招标排斥其他投标人的行为.由于这种行为弱化了投标人之间的正当竞争,使政府投资项目通过招标以节约投资的目的不能实现,因此,其危害性很大.本文对这种串谋行为进行了经济学分析,在此基础上进行了防范该行为的机制设计.