Asymmetric awareness and moral hazard

This paper introduces asymmetric awareness into the classical principal–agent model and discusses the optimal contract between a fully aware principal and an unaware agent. The principal enlarges the agentʼs awareness strategically when proposing a contract and faces a tradeoff between participation and incentives. Leaving the agent unaware allows the principal to exploit the agentʼs incomplete understanding of the world, relaxing the participation constraint, while making the agent aware enables the principal to use the revealed contingencies as signals about the agentʼs action choice, relaxing the incentive constraint. The optimal contract reveals contingencies that have low probability but are highly informative about the agentʼs effort.     

Efficient moral hazard

This paper presents an infinite-horizon, discounted dynamic programming model of the endogenous opportunity costs of an agent’s effort that is allocated among an endogenous number of principals. An agent allocates effort between evaluating new principals and attending to current principals. Since each principal’s return is not maximized by the agent’s optimal allocation, moral hazard occurs in equilibrium. However, since the agent maximizes the total expected value of all undertaken projects, the agent’s allocation of effort is efficient. If the agent chooses a single principal, then moral hazard does not occur and the allocation is efficient. These results are contrary to the inefficient moral hazard results in bilateral principal-agent (P-A) and common agency (C-A) models.     

SHOULD YOU ALLOW YOUR EMPLOYEE TO BECOME YOUR COMPETITOR? ON NONCOMPETE AGREEMENTS IN EMPLOYMENT CONTRACTS*

We discuss a principal–agent model in which the principal has the opportunity to include a noncompete agreement in the employment contract. We show that not imposing such an agreement can be beneficial for the principal, as the possibility to leave the firm generates implicit incentives for the agent. The principal prefers to impose such a clause if and only if the value created is sufficiently small relative to the agent's outside option. If the principal can use an option contract for retaining the agent, she will never prefer a strict noncompete agreement.     

The value of information in a principal-agent model with moral hazard: The ex post contracting case

In a principal-agent model with moral hazard, a signal about the principal?s technology — the stochastic mapping from the agent?s action to the outcome — is observed before the contract is offered. The signal is either uninformative (null information), informative and observed only by the principal (private information), or also observed by the agent (public information). We show that, from an ex ante standpoint (before the signal is observed): (i) the agent prefers private to both null and public information; (ii) the principal sometimes prefers null to both private and public information; and (iii) when the principal prefers public to null information, she prefers public to private information, whereas the agent prefers private to public information. In this last situation, we also show that (iv) for any separating equilibrium with private information, there exists a contract with public information that both strictly prefer.     

Present-biased preferences,self-awareness and shirking

We model a mechanism design problem in which the principal owns a project that requires work effort by an agent, but agents may have time-inconsistent, present-biased preferences and lack complete self-awareness of these preferences. The self-control problem and naïveté of an agent may lead him to agree to a contract but later shirk or slack-off, even though doing so is observable. When the principal cannot severely punish shirking and agents are completely naïve, the second-best solution entails allowing a present-biased agent to slack-off in order to avoid a greater loss due to shirking. With greater self-awareness among present-biased agents, the principal may do better by screening some from accepting the contract. Furthermore, when shirking can be severely punished, this does not lead to contracts that eliminate effects of the self control problem. Instead the principal may exploit present-biased agents by offering a contract that allows them to slack-off (which agents fail to foresee they will choose to do) but at the expense of foregoing much compensation.     

Moral Hazard and Other-Regarding Preferences

The paper aims at obtaining new theoretical insights by combining the standard moral hazard models of principal–agent relationships with theories of other-regarding preferences, in particular inequity aversion theory. The principal is in general worse off, as the agent cares more about the wellbeing of the principal. When there are multiple symmetric agents who care about each other's wellbeing, the principal can optimally exploit their other-regarding nature by designing an appropriate interdependent contract such as a "fair" team contract or a relative performance contract. The approach taken in this paper can shed light on issues on endogenous preferences within organizations.     

联合确定基数合约:对魏茨曼模型的一个改进

本文针对国内外委托代理理论主要局限于理论分析层面而实用性不强的特点,在概要评论有关利润基数确定的相关文献的基础上,通过对美国一家公司委托代理实际案例的研究,提出了旨在能够解决实际委托代理关系的"联合确定基数法"。文章分析了联合确定基数法与棘轮效应模型的区别和联系,以数学方法论证了联合确定基数法的若干命题,描述了公司利润基数确定的利益诱导机制,并对比分析了联合确定基数法与西方教科书中的"激励设计模型"。本文试图以联合确定基数法为核心内容的一次性动态模型,代替蕴含着讨价还价过程的多次性动态模型。     

Unemployment insurance with hidden savings

This paper studies the design of unemployment insurance when neither the searching effort nor the savings of an unemployed agent can be monitored. If the principal could monitor the savings, the optimal policy would leave the agent savings-constrained. With a constant absolute risk-aversion (CARA) utility function, we obtain a closed form solution of the optimal contract. Under the optimal contract, the agent is neither saving nor borrowing constrained. Counter-intuitively, his consumption declines faster than implied by Hopenhayn and Nicolini (1997) [1]. The efficient allocation can be implemented by an increasing benefit during unemployment and a constant tax during employment.     

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。     

The effects of pay regulation when agents are loss averse

This article analyses the effects of a regulatory cap on executive pay when the agent is loss averse. I use a principal–agent model with moral hazard in which a principal and an agent bargain over an incentive contract. I show that even a non-binding cap on the agent’s payments can have consequences for the bargained outcome and consequently for the effort the agent exerts.     

What's the damage? Environmental regulation with policy‐motivated bureaucrats

In choosing environmental policy, governments rely on information provided by bureaucrats, who may have a political motivation of their own. We analyze the ensuing principal–agent relationship and derive the government's optimal contract. We find that a regulatory agent who is more environmentalist than the government is rewarded for truthfully stating that the environmental impact of the regulated economic activity is low (and vice versa). The bureaucrat has a stronger influence on policy if there is greater uncertainty about the environmental impact, or if the policy choice has a strong weight in his utility function. For some impact values, the bureaucrat is permitted to set his own preferred policy, which is a form of optimal delegation.     

流域环境恶化是环保合约“要挟”的结果

要挟是经济生活中的一种普遍现象。本文用要挟理论对环境保护合约进行了全面的分析,认为流域环境不断恶化是上游群众要挟的结果。要改变这一事实,还必须从调整“合约”做起。     

私募基金合伙人契约研究*

本文借助委托代理理论框架研究私募基金的合伙人契约。有限合伙制下普通合伙人（代理人）拥有人力资本,而有限合伙人（委托人）拥有货币资本。人力资本相对稀缺,使得普通合伙人在博弈中处于相对有利地位,并获得设计合伙人契约的权利,从而博弈流程与公司制具有质的不同。本文首先给出与公司制下米里斯霍姆斯特姆罗杰森条件相对应的有限合伙制下的最优契约决定条件,将两种机制进行比较,从理论上解释私募基金的运营实践。有限合伙制下的激励程度更高,普通合伙人有动力实现更好的业绩。本文最后讨论线性契约并进行相应的函数模拟。     

Performance Standards and Incentive Pay in Agency Contracts

When the presence of limited liability restricts a principal from imposing monetary fines on an agent in case of poor performance, the principal might use other kinds of punishment threats to deter the agent from shirking. We show that under the optimal contract in this case, the principal sets a performance standard and punishes the agent if the standard is not met, but rewards the agent on a profit-sharing basis if the standard is significantly exceeded. The optimal choice of performance standards for such contracts is discussed. It is shown that punishment threats, although inefficient, often help the principal to discipline the agent.
JEL classification : D 82     

Enforcement frictions and optimal lending contracts

I consider an environment in which contract enforcement is a decision variable for the principal. I construct a model in which entrepreneurs cannot commit to repaying investors for the capital advanced, but investors can force repayment by spending resources. The principal uses enforcement to reduce the resources available to the agent after a default, thus providing incentives for the agent to stay in the relationship. She also ensures contract compliance by backloading the payments to the agent: expected utility rises over time, preventing a default. I consider an application of the framework developed in the paper to the area of firm dynamics. I show that enforcement and backloading are always used jointly. Firm size (measured by capital) grows with time and each firm converges to the efficient size. A second application is to the field of economic development. Costlier enforcement leads to the choice of sub-optimal technology; secondly, it leads to inefficient dispersion of capital across establishments.     

WHY DOES IT MATTER THAT BELIEFS AND VALUATIONS BE CORRECTLY REPRESENTED?*

This article contains an analysis of a simple principal–agent problem illustrating possible problems that may arise when the prinicpal ascribes to the agent subjective probabilities and utilities that are implied by the subjective expected utility model but do not represent the agent's beliefs and valuations. In particular, it is possible that an incentive contract designed by the principal induces the agent to choose an action that is not in the principal's best interest.     

Contract Choice: Efficiency and Fairness in Revenue‐Sharing Contracts

We present a simple principal–agent experiment in which the principals are allowed to choose between a revenue‐sharing, a bonus, and a trust contract, to offer to an agent. Our findings suggest that a large majority of experimental subjects choose the revenue‐sharing contract. This choice turns out to be not only the most efficient but also, at the same time, fair. Overall, the distribution of earnings is only mildly skewed towards the principal. We conclude that, under revenue‐sharing contracts, concerns for fairness can be closely associated with the use of monetary incentives.     

Informed principal with correlation

In this paper we analyze an adverse selection model with one principal and one agent, who are both risk neutral and have private information. We assume that the private information of the principal is correlated with that of the agent. The main result of the paper is that the principal can extract a larger share of the surplus from the agent than in the case where her information is public. The principal can design such a contract because she exploits the fact that her type is an informative signal on the agent's one. We fully characterize the equilibrium of the game in which different types of principal offer the same menu of contracts that leaves the agent uninformed about the principal's type. This gives more freedom to the principal when setting the transfers because the agent's constraints need to hold only at an interim stage.     

私募基金的管理规模与最优激励契约

私募基金是一种新兴的资产管理模式,其本质上也是一种委托代理契约。本文利用Tirole(2006)的公司融资分析框架和思想,研究了私募基金管理者与基金外部投资人的委托代理关系,求解出私募基金的最优管理规模和分成比例,并用数值计算方法对理论结果进行了讨论。理论模型和数值计算表明:私募基金的最优管理规模和分成比例是存在的;只有在某些特定的参数组合下,现实中广泛使用的"2—20"合同才具有某种合理性,且并非最优;业绩表现费有助于降低私募基金管理者的道德风险。     

Optimal contract mechanisms for principal-agent problems with moral hazard and adverse selection

Summary We examine the problem of incentive compatibility and mechanism design for incomplete information principal-agent problems. Allowing for risk aversion on the part of the principal and agent, we show the existence of an optimal, incentive compatible contract selection mechanism for the principal under conditions of moral hazard and adverse selection. Since we assume that the contract set is a function space of state contingent contracts, and that the set of agent types is uncountable, the set of contract selection mechanisms becomes infinite dimensional. Hence, novel existence arguments are required. Our existence result extends those of Grossman and Hart [10] and Page [23] to an infinite dimensional setting with incomplete information.