Implementing high‐powered contracts to motivate intertemporal effort supply

We characterize the optimal contract between a principal and a risk‐neutral, wealth‐constrained agent when an adverse selection problem follows a moral hazard problem. The optimal contract in this setting often is more steeply sloped for the largest output levels than is the optimal contract in either the standard moral hazard setting or the standard adverse selection setting. The large incremental rewards for exceptional performance motivate the agent to deliver substantial effort both before and after he acquires privileged information about the production environment.     

Unemployment insurance with a hidden labor market

We consider the problem of optimal unemployment insurance (UI) in a repeated moral hazard framework. Unlike existing literature, unemployed individuals can secretly participate in a hidden labor market. This extension modifies the standard problem in three dimensions. First, it imposes an endogenous lower bound for the lifetime utility that a contract can deliver. Second, it breaks the identity between unemployment payments and consumption. And third, it hardens the encouragement of search effort. The optimal unemployment insurance system in an economy with a hidden labor market is simple, with an initial phase in which payments are relatively flat during unemployment and with no payments for long-term unemployed individuals. This scheme differs substantially from the one prescribed without a hidden labor market and resembles unemployment protection programs in many countries.     

Optimal Contracts Under Adverse Selection and Moral Hazard: A Continuous-Time Approach

This article presents a continuous-time agency model in thepresence of adverse selection and moral hazard with a risk-averseagent and a risk-neutral principal. Under the model setup, weshow that the optimal controls are constant over time, and thusthe optimal menu consists of contracts that are linear in thefinal outcome. We also show that when a moral hazard problemadds to an adverse selection problem, the monotonicity conditionwell known in the pure adverse selection literature needs tobe modified to ensure the incentive compatibility for informationrevelation. The model is applied to a few managerial compensationproblems involving managerial project selection and capitalbudgeting decisions. We argue that in the third-best world,the relationship between the volatility of the outcome and thesensitivity of the contract depends on interactions betweenthe managerial cost and the firm’s production functions.Contrary to conventional wisdom, sometimes the higher the volatility,the higher the sensitivity of the contract. The firm receivinggood news sometimes chooses safer projects or invests less thanit does with bad news. We also examine the effects of the observabilityof the volatility on corporate investment decisions.     

On the Role of Patience in an Insurance Market With Asymmetric Information

We analyze a two-period competitive insurance market that is characterized by the simultaneous presence of moral hazard and adverse selection with regard to consumer time preferences. It is shown that there exists an equilibrium in which patient consumers use high effort and buy an insurance contract with high coverage, whereas impatient consumers use low effort and buy a contract with low coverage or even remain uninsured. This finding may help to explain why the opposite of adverse selection with regard to risk types can sometimes be observed empirically.     

基于Agent的保险系统非对称信息博弈研究

本文基于保险系统复杂性特征和复杂性科学在解决系统非线性和复杂性交互行为方面的优势,针对保险系统中非对称信息的特点,运用博弈数学模型系统分析保险系统非对称信息,通过CAS理论构建了基于Agent的保险系统仿真模型并在swarm平台上实现了关于保险系统逆向选择问题的经典模型的动态仿真。结果表明：信息不对称产生了保险逆向选择和道德风险,妨碍了保险机制顺利运行,使保险系统资源配置效率严重降低。     

Moral hazard,adverse selection,and health expenditures: A semiparametric analysis

Theoretical models predict asymmetric information in health insurance markets may generate inefficient outcomes due to adverse selection and moral hazard. However, previous empirical research has found it difficult to disentangle adverse selection from moral hazard in health care consumption. We propose a two‐step semiparametric estimation strategy to identify and estimate a canonical model of asymmetric information in health care markets. With this method, we can estimate a structural model of demand for health care. We illustrate this method using a claims‐level data set with confidential information from a large self‐insured employer. We find significant evidence of moral hazard and adverse selection.     

Der Einfluss einer staatlichen Grundsicherung auf die Versicherungsnachfrage bei asymmetrischer Informationsverteilung

In this article, we develop a model framework in which the influence of a state assistance on insurance demand in an insurance market with imperfect information can be examined. It turned out that a state subsidy of very low level has no influence on the insurance demand at all. If the state assistance is adequately high, the individuals will prefer government assistance to market insurance. In case of adverse selection, a state assistance can have the consequence that the good risks decide not to buy any insurance while the bad risks purchase full insurance cover. The state assistance can therefore contribute to solve the problem of adverse selection. In case of moral hazard, a surprising result has been found out. The state assistance can bring the measures of loss minimizing to a standstill before the insurance can do it. The state subsidy amplifies the moral hazard behaviour and is therefore not a suitable instrument to solve problems with moral hazard.     

Was spricht eigentlich gegen eine private Arbeitslosenversicherung?

This article wants to base the current discussion about the privatization of unemployment insurance on a perspective of insurance economics. The arguments against private unemployment insurance are separated in two prospects: insurance technique and social policy. Therefore, the mixing of objective-technical and normative arguments, which is widely spread in the literature, is broken down. It is shown that the only criterion, which holds against private unemployment insurance, is that of “relative poorness”. Consequently, from a social policy perspective the monetary burden of actuarial premiums on people at high and medium risk is not acceptable. Arguments like positively correlated risks, moral hazard, insufficient differentiation of premiums and collectively underestimated individual unemployment risks appear to be poorly valid. As a solution of the problem of “relative poorness” a new outline for privatization of unemployment insurance is presented. The proposal focuses on a combination of private unemployment and pension insurance.     

Asymmetric information in insurance: general testable implications

Several recent articles on empirical contract theory and insurance have tested for a positive correlation between coverage and ex post risk, as predicted by standard models of pure adverse selection or pure moral hazard. We show here that the positive correlationproperty can be extended to general setups: competitive insurance markets and cases where risk aversion is public. We test our results on a French dataset. Our tests confirm that the estimated correlation is positive; they also suggest the presence of market power.     

Equilibrium matching and termination

In an equilibrium model of the labor market with moral hazard, jobs are dynamic contracts, job separations are terminations of optimal dynamic contracts. Transitions from unemployment to new jobs are modeled as a process of random matching and Nash bargaining. Non-employed workers make consumption and saving decisions as in a standard growth model, as well as whether or not to participate in the labor market. The stationary equilibrium is characterized. The model is then calibrated to the U.S. labor market to study quantitatively the worker flows and distributions, the compensation dynamics, and the effects of UI system.     

Unemployment insurance and incentives

In this paper we present a partial economic equilibrium model of the labor market in which we maximize the workers' expected discounted utility level, while implying a zero expected profit for the firms. The model we use for the labor market takes into consideration transitions between the various states of employment and the time periods spent in each state. The probability distribution of these time periods may be arbitrary, not restricted to being exponential, as is the case for ordinary time-continuous Markov processes. The basic principles and difficulties arising from monitoring problems and moral hazard are discussed. In order to analyze unemployment insurance schemes that include incentives for workers to avoid unemployment, we depart from the simplest form of the principle of equivalence in insurance. Several different alternatives are discussed, all giving rise to partial insurance and thus incentives. We also analyze the effects that early retirement have on unemployment. Here, we include social security benefits in the economic model. Finally, we show that the optimal solutions entail quantity rationing.     

Asymmetric Information Problems in Taiwan's Automobile Insurance Market: The Effect of Policy Design on Loss Characteristics

This article investigates asymmetric information problems for the automobile insurance market in Taiwan. Using panel data for the comprehensive automobile insurance coverage from 1995 to 1999, this article analyzes how types of coverage, deductible amounts, and experience ratings have affected the adverse selection and moral hazard problems in Taiwan's automobile insurance market. The empirical results provide partial evidence to demonstrate that the loss frequency and loss ratio were reduced by the addition of self-selection mechanisms in policies with different levels of coverage. In addition, the deductible amounts, experience ratings, and better control of underwriting and claims processing were shown possibly to have decreased potential losses from adverse selection and moral hazard problems.     

The form of incentive contracts: agency with moral hazard,risk neutrality,and limited liability

The analysis obtains a complete characterization of the optimal agency contract with moral hazard, risk neutrality, and limited liability. We introduce a “critical ratio” that indicates the returns to providing the agent with incentives for effort in each random state. The form of the contract is debt (a capped bonus) when the critical ratio is increasing (decreasing) in the state. An increasing critical ratio in the state‐space setting corresponds to the hazard rate order for the reduced‐form distribution of output, which we term the “decreasing hazard rate in effort property” (DHREP). The critical ratio also yields insights into agency with adverse selection.     

Testing for Asymmetric Information in the Automobile Insurance Market Under Rate Regulation

This article examines whether adverse selection or moral hazard could be induced by rate regulation, which prohibits insurance companies from considering some attributes of drivers in setting premiums. Using an individual data set from a heavily regulated automobile insurance market, we arrived at several conclusions, as follows. First, no evidence of adverse selection or moral hazard is found in general: conditional on all the variables observed by insurer, the null hypothesis of independence between risk and coverage is not rejected at reasonable levels of statistical significance. Second, this result is robust in the sense that it holds under several empirical procedures and different definitions of risk and coverage. Third, we find that unobserved variables do not induce adverse selection: the null hypothesis that consumers in risky regions are more likely to purchase insurance is tested against the alternative and rejected. Our study supports the view that the adverse selection phenomenon exists only to a very limited extent in this market.     

On optimal unemployment compensation

The design of an optimal unemployment compensation scheme is analyzed, using a dynamic principal-agent relationship between a risk-neutral planner (the principal) and risk-averse workers (the agents), where the planner's inability to observe workers’ job-search efforts creates a moral hazard problem. To design an implementable scheme, we require that each agent is guaranteed a minimum level of expected discounted utility, regardless of his past history. In contrast with previous studies, we find that the optimal contract is quite close to actual unemployment compensation schemes, both qualitatively and quantitatively.     

A Continuous-Time Optimal Insurance Design with Costly Monitoring

We provide a theoretical and numerical framework to study optimal insurance design under asymmetric information. We consider a continuous-time model where neither the efforts nor the outcome of an insured firm are observable to an insurer. The insured may then cause two interconnected information problems: moral hazard and fraudulent claims. We show that, when costly monitoring is available, an optimal insurance contract distinguishes the one problem from the other. Furthermore, if the insured’s downward-risk aversion is weak and if the participation constraint is not too tight, then a higher level of the monitoring technology can mitigate both problems.     

A Model of the Demand for Investment Banking Advising and Distribution Services for New Issues

This paper presents a theory of the demand for investment banking advising and distribution services for the case in which the investment banker is better informed about the capital market than is the issuer, and the issuer cannot observe the distribution effort expended by the banker. The optimal contract under which the offer price decision is delegated to the better-informed banker in order to deal with the adverse selection and moral hazard problems resulting from the informational asymmetry and the observability problem is characterized. The model demonstrates a positive demand for investment banking advising and distribution services and provides an explanation of the underpricing of new issues.     

基于风险区划下的玉米区域产量保险差别费率厘定——以吉林省九个地级市为例

农业保险发展过程中难以避免逆向选择的发生,区域产量保险的提出可以为减少逆向选择和道德风险提供基础,是农业保险未来的发展方面。通过以玉米种植为例,利用产量指标为基础,将吉林省各地区分为三个风险区域,并在此基础上进行区域产量保险的费率厘定,得到区域级别的费率,为吉林省玉米保险的发展提供意见建议。     

Deposit insurance and subsidized recapitalizations

The 2007–2009 financial crisis saw a vast expansion in deposit insurance guarantees around the world and yet our understanding of the design and consequences of deposit insurance schemes is in its infancy. We provide a new rationale for the provision of deposit insurance. In our model the banking sector exhibits both adverse selection and moral hazard, which implies that the social benefits of bank monitoring must for incentive reasons be shared between depositors and banks. Consequently, socially too few deposits are made in equilibrium. Deposit insurance – or, equivalently, bank recapitalization – corrects this market failure. We find that deposit insurance should be funded not by banks or depositors but out of general taxation. The optimal level of deposit insurance varies inversely with the quality of the banking system. Hence, when the soundness of the financial sector is uncertain, governments should consider supporting deposit insurance schemes and undertaking subsidized recapitalizations.