Kellogg School of Management

Management & Strategy Department

MEDS Department

Northwestern Economics Department


Strategy Department
Kellogg School of Management
Leverone Hall, 6th Floor
2001 Sheridan Road
Evanston, IL 60208-2001

Phone: 847-467-0306
Fax: 847-467-1777


Curriculum Vita


Statement of Research




Organizational Economics

  • Managing Conflicts in Relational Contracts” joint with Niko Matouschek, American Economic Review, Vol 103, No. 6, (Oct 2013) pp.2328-51.

    A worker interacts repeatedly with a manager who is privately informed about the opportunity costs of paying him. The worker therefore cannot distinguish non-payments that are efficiency enhancing from those that are rent extracting. The optimal relational contract generates periodic conflicts during which effort and expected profits decline gradually but recover instantaneously. To manage a conflict, the manager uses a mix of informal promises and formal commitments that evolves with the duration of the conflict. Liquidity constraints limit the manager’s ability to manage conflicts but may also induce the worker to respond to a conflict by providing more effort rather than less.

  • Relational Contracts with Private Subjective Evaluations” joint with Joyee Deb and Arijit Mukherjee, Rand Journal of Economics, Vol 47, No. 1, (Spring 2016) pp.3-28.

This article analyzes the optimal use of peer evaluations in the provision of incentives within a team, and its interplay with relational contracts. We consider an environment in which the firm pays a discretionary bonus based on a publicly observed team output but may further sharpen incentives by using privately reported peer evaluations. We characterize the optimal contract, and show that peer evaluations can help sustain relational contracts. Peer evaluations are used when the firm is less patient and the associated level of surplus destruction is small. Moreover, peer evaluation affects a worker's pay only when the public output is at its lowest level and the co-worker sends the worst report. Noticeably, a worker's report does not affect his own pay, as the provision of effort incentives cannot be decoupled from the incentive for truthful reporting of peer performance. To induce the workers both to put in effort and to report truthfully, the firm may find it optimal to neglect signals that are informative of the worker's effort.

We explore subjective performance reviews in long-term employment relationships. We show that firms benefit from separating the task of evaluating the worker from the task of paying him. The separation allows the reviewer to better manage the review process, and can therefore reward the worker for his good performance with not only a good review contemporaneously, but also a promise of better review in the future. Such reviews spread the reward for the worker�s good performance across time and lower the firm�s maximal temptation to renege on the reward. The manner in which information is managed exhibits patterns consistent with a number of well-documented behavioral biases in performance reviews.

We explore the evolution of power within organizations. To this end, we examine an infinitely repeated game in which a principal can empower an agent by letting him choose a project. The principal, however, does not know what projects are available to the agent. We characterize the optimal relational contract and explore its implications. Our results speak to how power is earned, lost, and retained. They show that entrenched power structures are consistent with managers who are managing power optimally. And they provide a new perspective on two long-standing issues in organizational economics.

This paper studies a relational contracting model in which the agent is protected by a limited liability constraint. The agent�s effort is his private information and affects the output stochastically. We characterize the optimal relational contract and compare the dynamics of the relationship with that under the optimal long-term contract. Under the optimal relational contract, the relationship is less likely to survive, and the surviving relationship is less efficient. In addition, relationships always converge under the optimal long-term contract, but they can cycle under the optimal relational contract.

Reputation is a valuable asset to firms, yet the impact of corporate governance of reputationreliant firms is underexplored. This paper investigates how a firm�s reputation in the product market responds to a change in its controlling shareholder, and derives the optimal firm ownership and control structure. We consider a dynamic model of an experience-goods firm, in which a controlling shareholder actively engages in management, and the controlling share block can be traded through private negotiation. In the optimal equilibrium, the firm�s reputation in the product market is linked to its behavior in the market for corporate control to provide proper incentive for the controlling shareholder to maintain a good firm reputation. Our analysis also identifies an endogenous cost of corporate control, and provides a rationale for the separation of ownership and control. We derive the optimal ownership structure and draw implications on the dynamics of control premium.

We consider a model in which a principal must both repay a loan and motivate an agent to work hard. Output is non-contractible, so the principal faces a commitment problem with both her creditor and her agent. In a profit-maximizing equilibrium, the agent's productivity is initially low and increases over time. Productivity continues increasing even after the debt has been repaid, eventually converging to a steady state that is independent of the size of the initial loan. We apply the model to argue that a firm that relies on external debt will typically under-invest in the scale of its existing businesses, but might either over- or under-invest when expanding into new lines of business.

A worker may shirk on some of the aspects of his job in order to privately learn which ones are more critical and use this information in the future to shirk more effectively. This possibility of private learning aggravates the moral hazard problem. We study the optimal provision of relational incentives to deter the worker from such "learning-by-shirking". The firm strategically discloses information on the role of each job aspect to sharpen incentives and the optimal disclosure policy depends on the surplus in the relationhip. Depending on the underlying parameters, the optimal policy may call for opacity, full disclosure, as well as partial disclosure through stochastic revelation.

  • “Implementing Change in Organizations” joint with Niko Matouschek, Mike Powell, and Xi Weng.
  • “Strategic Transparency and Organizational Rigidity” joint with Arijit Mukherjee and Luis Vasconcelos.
  • “A Theory of Player Turnover in Games” joint with Yuk-Fai Fong.


Labor Economics

This paper develops a model of job mobility and wage dispersion with asymmetric information. Contrary to the existing models in which the superior information of current employers lead to market collapse, this model generates a unique equilibrium outcome in which a) positive turnover exists and b) identical workers can be paid differently. The model implies that, in the presence of technological change that is skill-biased and also favors general skills over firm-specific skills, the wage distribution will become more spread out (corresponding to greater inequality) and job mobility will increase.

We develop a model of turnover and wage dynamics with insurance, match-specific productivity, and long-term contracting. The model predicts that wages are downward rigid within firms but can decrease when workers are fired. We apply the model to study the impact of business cycles on subsequent wages and job mobility. Workers hired during a boom have persistent higher future wages if staying with the same firm. However, these boom hires are more likely to be terminated and have shorter employment spells.

This paper develops a model of wage distribution and wage dynamics based on assignment and Pareto learning. The model matches a large number of key facts about wage distribution and wage dynamics. The tractability of Pareto learning allows us to derive joint implications on the wage distribution and wage dynamics as assignment becomes more important. Our model also provides a natural framework for decomposing the earning variance into a permanent component and a transitory one, and it helps explain why the growing importance in assignment can lead to both higher wage inequality and higher wage instability.

Firms' organizational structures impose constraints on their ability to use promotion-based incentives. We develop a framework for identifying these constraints and exploring their consequences. We show that firms manage workers careers by choosing personnel policies that resemble an internal labor market. Firms may adopt forced-turnover policies to keep lines of advancement open, and they may alter their organizational structures to relax these constraints. This gives rise to a trade-off between incentive provision at the worker level and productive efficiency at the firm level. Our framework generates novel testable that connect firm-level characteristics with workers' careers.

  • “Managing Firm Growth ” joint with Rongzhu Ke and Mike Powell.

We study the implications of firm growth on the design of personnel policy. We characterize the optimal personnel policy allowing for bonus and the assignment rules to be history-dependent. We show that when a firm offers limited promotion opportunities--for example when the firm's growth stalls--the optimal promotion policy takes the form of a seniority rule. we also show that the average wage is lower in a faster-growing firm. Finally, we show that a firm is more profitable when its growth rates are more stable over time.

  • “Labor-Market Regulation and Workers' Careers in Organizations” joint with Rongzhu Ke and Mike Powell.

We study how labor--market policies impact workers careers through their effects on firmspersonnel policies. We show that progressive taxation, which disproportionately affects top workers, also has indirect effects on bottom workersfewer workers are hired at the bottom, but the workers who are hired have greater promotion opportunities. In addition, an increase in the minimum wage can increase employment in the firm. In particular, employment at the bottom of the firm can increase, since limited--liability rents can serve as a substitute for career--based incentives for bottom workers: minimum wages may lead to the proliferation of dead-end jobs.

  • “Going for it: The Adoption of Risky Strategies in Tournament” joint with Jen Brown.



This paper studies bidder behavior in simultaneous, continuous, ascending price auctions. We design and implement a "collusion incubator" environment based on a type of public, symmetrically "folded" and "item-aligned" preferences. Tacit collusion develops quickly and reliably within the environment. Once tacit collusion developed, it proved remarkably robust to institutional changes that weakened it as an equilibrium of a game-theoretic model. The only succcessful remedy was a non-public change in the preference of participants that destroyed the symmetrically, "folded" and "item aligned" patterns of preferences, creating head-to-head competition between two agents reminiscent of the concept of a "maverick."

This paper investigates firms’ abilities to tacitly collude when these firms each monopolize a proprietary aftermarket. When firms’ aftermarkets are isolated from foremarket competition, they cannot tacitly collude more easily than single-product firms do. However, when their aftermarket power is contested by foremarket competition as equipment owners view new equipment as a substitute for their incumbent firm’s aftermarket product, the monopoly profit is sustainable among a larger number of firms. These results hold regardless of whether consumers are sophisticated enough to anticipate a price war upon observing a deviation. Conditions under which introduction of aftermarket competition hinders firms’ ability to tacitly collude are characterized.

In an uncertain environment, when does an increase in the breadth of activities in which individuals interact together help foster collaboration on each activity? We show that when players, on average, prefer to stick to a cooperative agreement rather than reneging by taking their privately optimal action, then collaboration can be approximately sustained in a sufficiently broad relationship. This is in contrast to existing results showing that a cooperative agreement can be sustained only if players prefer to adhere to it in every state of the world. We consider applications to favor exchange, multimarket contact, and relational contracts.