Cross-ownership as a hostage exchange to support collaboration

The impossibility of writing complete contracts causes loss of profitable transactions among firms, since their managers cannot ex ante bind themselves to future actions. We show how a reallocation of ownership rights into a network of mutual shareholdings among a coalition of firms produces an efficient enforcement mechanism. Co-operation is achieved by exchanging control rights until a mutual threat of capture of control is established. By making control over their firms vulnerable to a takeover by the other members of the coalition, each firm is able to make a credible commitment to future efficient actions. In equilibrium no punishment is administered, so that the arrangement achieves the outcome under complete contracts. More generally, it is proved that a mutual hostage exchange may dominate the threat of loss of reputation as an enforcement mechanism.     

Stable and efficient coalitional networks

We develop a theoretical framework that allows us to study which bilateral links and coalition structures are going to emerge at equilibrium. We define the notion of coalitional network to represent a network and a coalition structure, where the network specifies the nature of the relationship each individual has with her coalition members and with individuals outside her coalition. To predict the coalitional networks that are going to emerge at equilibrium we propose the concepts of strong stability and of contractual stability. Contractual stability imposes that any change made to the coalitional network needs the consent of both the deviating players and their original coalition partners. Requiring the consent of coalition members under the simple majority or unanimity decision rule may help to reconcile stability and efficiency. Moreover, this new framework can provide insights that one cannot obtain if coalition formation and network formation are tackled separately and independently.     

Importance of status quo when lobbying a coalition government

Lobbying a coalition government is different from lobbying a single-party government, since in the case of a coalition government, the interest group can intervene in the intragovernmental decision process. In the case where the interest group prefers the status quo to the surplus maximizing policy, the interest group influences the policy without any contribution due to its credible threat to block unfavorable proposals. Furthermore, we show that when, say, a leftist coalition government may be replaced by a rightist coalition government, the final policy reflects a rightist interest group’s preferences more heavily due to the interest group’s forward-looking considerations.     

Endogenous coalition formation in contests

This paper analyzes coalition formation in a model of contests with linear costs. Agents first form groups and then compete by investing resources. Coalitions fight for a prize that is assumed to be subject to rivalry, so its value is non-increasing in the size of the group that obtains it. This formulation encompasses as particular cases some models proposed in the rent-seeking literature. We show that the formation of groups generates positive spillovers and analyze two classes of games of coalition formation. A contest among individual agents is the only stable outcome when individual defections leave the rest of the group intact. More concentrated coalition structures, including the grand coalition, are stable when groups collapse after a defection, provided that rivalry is not too strong. Results in a sequential game of coalition formation suggest that there exists a non-monotonic relationship between the level of underlying rivalry and the level of social conflict.

“If men were supplied with every thing in the same abundance, justice and injustice would be equally unknown among mankind.” David Hume (1740), A Treatise of Human Nature

I thank Luis Corchón, Joan Esteban, Michelle Garfinkel and József Sákovics for their comments and suggestions on the paper.     

When does universal peace prevail? Secession and group formation in conflict

This paper analyzes secession and group formation in the general model of contests due to Esteban and Ray (1999). This model encompasses as special cases rent seeking contests and policy conflicts, where agents lobby over the choice of a policy in a one-dimensional policy space. We show that in both models the grand coalition is the efficient coalition structure and agents are always better off in the grand coalition than in a contest among singletons. Individual agents (in the rent seeking contest) and extremists (in the policy conflict) only have an incentive to secede when they anticipate that their secession will not be followed by additional secessions. Incentives to secede are lower when agents cooperate inside groups. The grand coalition emerges as the unique subgame perfect equilibrium outcome of a sequential game of coalition formation in rent seeking contests. Received: March 2004, Accepted: October 2004, JEL Classification: D72, D74 We thank Joan Maria Esteban, Kai Konrad, Debraj Ray, Stergios Skaperdas and two anonymous referees for helpful comments on the paper. We also benefitted from comments by seminar participants in Barcelona, Istanbul, Paris and WZB Berlin.     

International cooperation on biodiversity conservation when spatial structures matter

International cooperation on biodiversity conservation when spatial structures matter. Spatial Economic Analysis. This paper considers the stability of international environmental agreements (IEAs) for biodiversity conservation with an explicit spatial structure. It studies the impact of distance between countries on coalition stability. It analyses a circular spatial structure with different spatial patterns. Robust results are obtained for a wide range of cost-and-benefit parameters: stable coalitions have a maximum size of two members. The best global payoff is obtained when coalitions are composed of neighbouring countries with the smallest possible distance. A ‘remoteness effect’ is observed, i.e., some coalitions of two members are unstable when one of the signatory countries is far away from the other coalition member and from the singletons.     

A core equivalence theorem with an arbitrary communication structure

We formalize the concept of a communication structure by identifying it with a partition of the set of agents. Thus, a coalition can form if and only if it belongs to the given partition. Within this framework we are able to show that for every integer J≧2, if we put the uniform distribution on the space of partitions that contain exactly (or, no more than) J coalitions, the probability that such a partition will contain a blocking coalition for any Pareto optimal allocation which is bounded away from being competitive, is arbitrarily close to 1, as the number of individuals increases.     

A model of influence with a continuum of actions

We generalize a two-action (yes–no) model of influence to a framework in which every player has a continuum of actions, among which he has to choose one. We assume the set of actions to be an interval. Each player has an inclination to choose one of the actions. Due to the influence among players, the final decision of a player, i.e., his choice of one action, may be different from his original inclination. In particular, a coalition of players with the same inclination may influence another player with different inclination, and as a result of this influence, the decision of the player is closer to the inclination of the influencing coalition than his inclination was. We introduce a measure of such a positive influence of a coalition on a player. Several unanimous influence functions in this generalized framework are considered. Also the set of fixed points under a given influence function is analyzed. Furthermore, we study linear influence functions and discuss their convergence. For a linear unanimous function, we find necessary and sufficient conditions for the existence of the positive influence of a coalition on a player, and we calculate the value of the influence index. We also introduce a measure of a negative influence of a coalition on a player.     

Spatial pillage game

A pillage game is a coalitional game as a model of Hobbesian anarchy. The spatial pillage game introduces a spatial feature into the pillage game. Players are located in regions and can travel from one region to another. The players can form a coalition and combine their power only within their destination regions, which limits the exertion of the power of each coalition. Under this spatial restriction, a coalition can pillage less powerful coalitions without any cost. The feasibility of pillages between coalitions determines the dominance relation that defines stable states in which powers among the players are endogenously balanced. With the spatial restriction, the set of stable states changes. However, if the players have forecasting ability, then the set of stable states does not change with the spatial restriction. Core, stable set, and farsighted core are adopted as alternative solution concepts.     

Examining how advocacy groups build relationships on the Internet

• In 2006, the Animal Enterprise Terrorism Act (AETA) became American law after brief Congressional discussions despite the public outcries from animal rights organizations. The AETA made it a federal terrorist crime to harm any animal enterprise financially, which could include legal forms of protests and boycotts. Members of the “Stop AETA” coalition failed to draw attention to the legislation. The relationship management theory of public relations provides a framework to determine how well the coalition members developed relationships with like‐minded individuals and the media. Results from a content analysis of the coalition members' Web sites revealed that nonprofit organizations and citizen‐advocacy groups attempted to develop relationships through a variety of strategies, including making the visit a positive experience, being open and transparent in their advocacy efforts, and providing access to coalition leaders. The results suggest that the coalition was unable to generate much news coverage for the issue because coalition members did not sufficiently reach out to cultivate relationships with journalists. Specific suggestions are provided for future advocacy groups to use the Internet to develop and cultivate relationships with key stakeholder groups.

Copyright © 2009 John Wiley & Sons, Ltd.     

西部地区农民增收模式创新初探

本文从西部地区农民增收缓慢,增收构成不合理的表象入手,分析了西部地区农民增收模式缺陷的根源在于落后的农业生产组织形式,从现代农业生产组织形式的角度,采用结构—行为—绩效的分析范式,提出农业股份有限公司这种生产组织形式,是确保西部地区农民增收可持续发展的有效模式。     

Walras degrees and probability of a blocking coalition at pareto allocations

We attempt to determine the probability of a blocking coalition from a notion of being non- Walrasian which does not rely on the explicit use of norms. The key concept introduced is that of Walras degrees. Theorem 1 gives the bounds of the probability of blocking in terms of these degrees. Theorem 2 gives the asymptotic conditional probability of a blocking coalition given that coalitions are losing. The relationship between the degrees of the conventional norms on allocations is also investigated.     

Time horizons matter: the hazard rate of coalition governments and the size of government

This study examines how coalition governments affect the size of government, measured by total central government expenditure as a share of GDP. Existing studies suggest that the presence of multiple political parties within ruling coalitions generate common pool resource problems or bargaining inefficiencies which, in turn, leads to more government spending when coalition governments are in office. We demonstrate that coalition governments have shorter time horizons than single party governments and use that finding to motivate a simple formal model. The model shows that coalition governments have greater incentives to increase government spending because of a lower discount factor in office. Results from empirical models estimated on a global sample of 111 democracies between 1975 and 2007 provide strong statistical support for the aforementioned theoretical prediction. The empirical results remain robust when we control for alternative explanations, employ different estimation techniques, and use different measures of government spending.     

The hybrid equilibria and core selection in exchange economies with externalities

This paper introduces a hybrid equilibrium concept that combines the elements of cooperative and non-cooperative behaviors in an exchange economy with externalities. For a fixed coalition structure (or a partition of traders), the hybrid equilibrium is a price and consumption bundle such that each coalition chooses a core solution from its budget set and the consumption bundles are feasible. It becomes the competitive equilibrium when the position is the finest, and it selects a core allocation when the partition is the coarsest. The paper provides sufficient conditions for the existence of a hybrid equilibrium for any coalition structure.     

The efficacy and efforts of interest groups in post elections policy formation

This paper presents a new model of interest groups and policy formation in the legislature. In our setting, the already given party ideological predispositions and power distribution determine the expected policy outcome. Our analysis applies to the case of un-enforced or enforced party discipline as well as to two-party and multi-party (proportional representation) electoral systems. The interest groups’ objective is to influence the outcome in their favor by engaging in a contest that determines the final decision in the legislature. Our first result clarifies how the success of an interest group hinges on the dominance of its ideologically closer party and, in general, the coalition/opposition blocks of parties under un-enforced party or coalition/opposition discipline. Such dominance is defined in terms of ideological inclination weighted by power. Our second result clarifies how the success of an interest group hinges on the dominance of its ideology in the ruling coalition (party) in a majoritarian system with enforced coalition (party) discipline. We then clarify under what condition an interest group prefers to direct its lobbying efforts to two parties or the two coalition and opposition blocks of parties under un-enforced discipline rather than to the members of the ruling coalition (party) under enforced discipline. The lobbying efforts under un-enforced and enforced party discipline are also compared. Finally, we clarify the effect of ideological predispositions and power on the efforts of the interest groups.     

Supplier empowerment: Mediating situational factors and perceived performance

The understanding of the behavioral and cognitive factors that affect organizations' performance has attracted increasing attention of scholars and practitioners. Based on the literature of psychological empowerment at the individual and the team levels, this study develops the concept of supplier empowerment in the context of purchasing and supply management. Further, this study proposes a research model that explores the role of supplier empowerment as a cognitive concept in mediating the relationship between situational factors (a supplier's process modularity and the mutual trust with its customers/buyers) and the supplier's perceived performance in its operations and customer service. This model is tested with 208 responses from automotive industry suppliers. The findings highlight the importance of empowered suppliers in decreasing inventory levels and increasing order fulfillment performance.     

Performance Management: Perceiving Goals as Invariable and Implications for Perceived Job Autonomy and Work Performance

In this study, we investigated whether perceiving goals as invariable is negatively related to work performance and whether this relationship is mediated by perceived job autonomy. Perceiving goals as invariable refers to the extent to which employees believe that the goals in a performance management system represent absolute standards that they must meet without exception, even if they think other factors are more important (e.g., situational factors or factors that are not associated with goals). In support of our hypotheses, we found a negative relationship between perceiving goals as invariable and work performance and that perceived job autonomy mediated this relationship. Theoretical and practical implications and directions for future research are discussed. © 2014 Wiley Periodicals, Inc.     

情境判断测验为何如此受青睐？一个系统的回顾

情境判断测验是一种多元结构和低度保真的情境模拟技术,旨在测评与工作绩效相关的KSAO,在实际应用中具有成本较低、操作简单、效率高、受欢迎、亚组差异小等优势,已成为一种有效而备受青睐的人力资源测评方法。相比其在国外的蓬勃发展之势,国内关于情境判断测验的研究与应用依旧非常缺乏。为推动情境判断测验在我国人力资源管理中的应用,本文在梳理国内外最新研究和应用成果的基础上,首先介绍了情境判断测验的概念与内涵、发展脉络与现状和理论基础,然后总结归纳了情境判断测验的测评内容与开发过程,并据此提出情境判断测验在人才选拔、培训开发、团队工作三个方面的具体应用和注意事项,最后对情境判断测验未来的研究和应用方向进行展望。     

Representation of transferable utility games by coalition production economies

We prove that, by the method of construction of a coalition production economy due to Sun et al. [Sun, N., Trockel, W., Yang, Z., 2008. Competitive outcomes and endogenous coalition formation in an n$n$-person game. Journal of Mathematical Economics 44, 853–860], every transferable utility (TU) game can be generated by a coalition production economy. Namely, for every TU game, we can construct a coalition production economy that generates the given game. We briefly discuss the relationship between the core of a given TU game and the set of Walrasian payoff vectors for the induced coalition production economy.