Dynamic Formation of Network with Adoption Externalities

We analyze an entry game with multiple periods, in each period of which privately informed agents who have not joined yet decide whether to subscribe to a network, and subscribers derive benefits in future periods depending on the network size. We study the case that the agents are sufficiently patient and show that there exists a unique symmetric \e\ if the number of existing subscribers is common knowledge in each period, thereby resolving the coordination problem which is prevalent in markets with network externalities. Asymmetric \ea\ may exist, but we show that they, if exist, converge to the unique symmetric \e\ as the number of agents increases without boundcoordination failure, unique symmetric equilibrium

A Simple Inducement Scheme to Overcome Adoption Externalities

Potential customers of network commodities face coordination problems due to adoption externalities that give rise to multiple, Pareto-ranked equilibria. We investigate the extent to which the coordination problem can be resolved by inducement schemes when agents’ preferences are private information. Specifically, we show that all symmetric “cut-off strategy” profiles (agents adopt if and only if their type is below a threshold) constitute the set of profiles that can be implemented as a unique equilibrium under an inducement scheme. We derive the ex ante cost of implementing each such profile. Furthermore, we fully characterize the set of inducement schemes that I) implement each such profile and ii) have the following simple form: each scheme specifies a fixed fee that every adopter pays, and a fixed gross subsidy/prize to be randomly allocated to (or evenly split among) the adopters. We discuss the implications of these findings on the design of optimal schemes for different network organizers, namely, private entrepreneurs and public entities.adoption externality, coordination, inducement scheme

Seller Reputation and Trust in Pre-Trade Communication

We characterize the unique equilibrium in which high ability sellers always announce the quality of their items truthfully, in a repeated game model of experienced good markets with adverse selection on a seller's propensity to supply good quality items. In this equilibrium a seller's value function strictly increases in reputation and a seller's type is revealed within finite time. The analysis highlights a new reputation mechanism based on an endogenous complementarity the market places between a seller's honesty in pre-trade communication (trust) and his/her ability to deliver good quality (reputation). As maintaining honesty is less costly for high ability sellers who anticipate less “bad news” to disclose, they can signal their ability by communicating in a more trustworthy manner. Applying this model, we examine the extent to which consumer feedback systems foster trust in online markets, including the possibility that sellers may change identities or exit.cheap talk, consumer rating system, reputation, trust.

Delegated Contracting and Corporate Hierarchies

In a typical corporate hierarchy, the manager is delegated the authority to make decisions that set directions for the organization, employ subordinates and contract with external suppliers. This paper explains when such delegation of authority can be optimal, using a model of a firm with three parties: the principal, the manager and the worker. In centralization with two two-tier hierarchies, the principal designs contracts for both agents. In delegation with a three-tier hierarchy, the principal directly contracts with a delegated agent who, in turn, contracts with the other agent. We identify an environment where the principal can benefit from delegating authority to the manager, but not to the worker. Beneficial delegation arises endogenously when delegation motivates the manager to acquire valuable information, which is used for better decision-making and more effcient incentive provision to the worker. We also show how total surplus is distributed in delegation vis-a-vis centralization, document comparative statics results regarding the benefits of delegation and the distribution of total surplus, and discuss when delegation is more likely to dominate centralizationCorporate hierarchies, centralization, delegation, optimal contract.

The Market for Liars: Reputation and Auditor Honesty

In the model there are two types of financial auditors with identical technology, one of which is endowed with a prior reputation for honesty. We characterize conditions under which there exists a "two-tier equilibrium" in which "reputable" auditors refuse bribes offered by clients for fear of losing reputation, while "disreputable" auditors accept bribes because even persistent refusal does not create a good reputation. The main findings are: (a) honest auditors charge higher fees, and have economic profits accruing to reputation; (b) as the fraction of auditors who are honest increases, the premium charged by reputable auditors eventually decreases, which diminishes the incentive to refuse bribes; (c) if the fraction of honest auditors exceeds an upper bound, there does not exist a two-tier equilibrium; (d) thus the reputation mechanism may be undermined by entry into the honest segment of the industry, if it is possible; (e) increasing auditor independence increases the upper bound.

INFORMATION GATHERING, DELEGATED CONTRACTING AND CORPORATE HIERARCHIES

In a typical corporate hierarchy, the manager is delegated the authority to make strategic decisions, and to contract with other employees. We study when such delegation can be optimal. In centralization, the owner retains the authority, which fails to motivate the manager to acquire valuable information, leading to suboptimal decisions and inefficient incentive provision to the worker. Beneficial delegation should necessarily motivate the manager to acquire information, which is possible only when the authority is delegated to the manager. We also document comparative statics results regarding the benefits of delegation and discuss when delegation is more likely to dominate centralization.Corporate hierarchies, information gathering, delegation, centralization.

Overcoming the Coordination Problem: Dynamic Formation of Networks

We analyze an entry game with multiple periods. In each period privately informed agents who have not yet joined decide whether to subscribe to a network. Subscribers derive benefits in future periods depending on the network size. We study the case where agents are sufficiently patient and show that there exists a unique symmetric equilibrium if the number of existing subscribers is common knowledge in each period. This resolves the coordination problem which is prevalent in markets with network externalities.Strategic complementarity, network externality, coordina-tion

Delegated Contracting and Corporate Hierarchies

In a typical corporate hierarchy, the manager is delegated the authority to make decisions that set directions for the organization, employ subordinates and contract with external suppliers. This paper explains when such delegation of authority can be optimal, using a model of a firm with three parties: the principal, the manager and the worker. In centralization with two two-tier hierarchies, the principal designs contracts for both agents. In delegation with a three-tier hierarchy, the principal directly contracts with a delegated agent who, in turn, contracts with the other agent. We identify an environment where the principal can benefit from delegating authority to the manager, but not to the worker. Beneficial delegation arises endogenously when delegation motivates the manager to acquire valuable information, which is used for better decision-making and more efficient incentive provision to the worker. We also show how total surplus is distributed in delegation vis-à-vis centralization, document comparative statics results regarding the benefits of delegation and the distribution of total surplus, and discuss when delegation is more likely to dominate centralization.Corporate hierarchies, centralization, delegation, optimal contract

Patent Protection, Takeovers, and Startup Innovation: A Dynamic Approach

The impact of IP protection on the innovation incentives of startup firms is examined in a dynamic model where an incumbent faces a sequence of potential startups and the incumbent's chance of winning an infringement lawsuit increases with the size of its patent portfolio. It is shown that takeover deals generate extra benefits for the incumbent via its enhanced future bargaining positions, a part of which accrues to the current startup as an increased bargaining share. This increased bargaining share can be large enough to justify the startup's innovation activity that would not have taken place otherwise. This effect may be greatest under moderate levels of IP protection, because the increase in the bargaining share, being proportional to the marginal benefits brought by the last patent added to the portfolio, would be too small if the protection was too weak while it would taper off too quickly if the protection was excessive.Patent litigation, takeovers, patent portfolios

Information, Authority, and Corporate Hierarchies

In a typical corporate hierarchy, the manager is delegated the authority to make strategic decisions, and to contract with other employees. By studying a model with one principal and two agents where one agent can gather information that is valuable for the principal's project choice and the other agent provides effort to the chosen project, we study when the principal can benefit from such delegation relative to centralization. We show that beneficial delegation is possible when complete contracts cannot be written, and delegation of authority should necessarily be to the information gatherer. The benets of delegation stem from either efficiency gains or reduction in rent to the information gatherer.Corporate hierarchies; information gathering; delegation; centralization.