Taxing Externalities under Financing Constraints (with Roman Inderst and Ulf Moslener), Economic Journal, forthcoming. 

Abstract: We consider an economy where production generates externalities, which can be reduced by additional firm level expenditures. This requires firms to raise outside financing, leading to deadweight loss due to a standard agency problem vis-à-vis outside investors. Policy is constrained as firms are privately informed about their marginal cost of avoiding externalities. We first derive the optimal linear pollution tax, which is strictly lower than the Pigouvian tax for two reasons: First, higher firm outside financing creates additional deadweight loss; second, through redistributing resources in the economy, a higher tax reduces average productive efficiency. We analyze various instruments that achieve a more efficient allocation, in particular, nonlinear pollution taxes, which can no longer be implemented through a tradable permit scheme alone, and grants tied to loans, which are frequently observed in practice.

Supplementary material: Working paper versionOnline Appendix.


Pre-Sale Information (with Roman Inderst), Journal of Economic Theory, 2011, 146 (6), 2333-2355.

Abstract: In markets as diverse as that for specialized industrial equipment or that for retail financial services, sellers or intermediaries may earn profits both from the sale of products and from the provision of pre-sale consultation services. We study how a seller optimally chooses the costly quality of pre-sale information, next to the price of information and the product price, and obtain clear-cut predictions on when information is over- and when it is underprovided, even though we find that information quality does not satisfy a standard single-crossing property. Buyers who are a priori more optimistic about their valuation end up paying a higher margin for information but a lower margin for the product when they subsequently exercise their option to purchase at a pre-specified price.

Supplement with some additional material: Supplement to "Pre-Sale Information".

Older (working paper) version: Price Discrimination and the Provision of Information.


Reward for Luck in a Dynamic Agency Model (with Sebastian Pfeil), Review of Financial Studies, 2010, 23 (9), 3329-3345.

Abstract: This article studies a continuous time principal-agent problem of a firm whose cash flows are determined by the manager's unobserved effort. The firm's cash flows are further subject to persistent and publicly observable shocks that are beyond the manager's control. While standard contracting models predict that compensation should optimally filter out these shocks, empirical evidence suggests otherwise. In line with this evidence, our model predicts that the manager is “rewarded for luck.”



Working Papers

Only time will tell: A theory of deferred compensation and its regulation (with Roman Inderst and Marcus Opp), EFA 2016, ES-NASM 2017, ES-EM 2017, AFA 2018 Meetings Paper.

Abstract: We characterize optimal contracts in settings where the principal observes informative signals over time about the agent's one-time action. If both are risk-neutral contract relevant features of any signal process can be represented by a deterministic "informativeness" process that is increasing over time. The duration of pay trades off the gain in informativeness with the costs resulting from the agent's liquidity needs. The duration is shorter if the agent's outside option is higher, but may be non-monotonic in the implemented effort level. We evaluate effects of regulatory proposals that mandate the deferral of bonus payments and use of clawback clauses.

This paper subsumes some insights from an earlier working paper titled Regulating deferred incentive pay


Dynamic Multitasking and Managerial Investment Incentives (with Sebastian Pfeil), r&r Journal of Financial EconomicsAFA 2015 Meetings Paper.

Abstract: We study long-term investment in a dynamic agency model with multitasking. The manager’s short-term task determines current performance which deteriorates if he invests in the firm's future profitability, his long-term task. The optimal contract dynamically balances incentives for short- and long-term performance such that investment is distorted upwards (downwards) relative to first-best in firms with high (low) technological returns to investment. These distortions decrease as good performance relaxes the endogenous financial constraints arising from the agency problem, implying negative (positive) investment-cash flow sensitivities. Investment distortions and cash flow sensitivities increase in absolute terms with short-term performance pay and external financing costs.


Persuasion through Selective Disclosure: Implications for Marketing, Campaigning, and Privacy Regulation (with Roman Inderst and Marco Ottaviani) - major update coming soon.

Abstract: By collecting personalized data, firms and political campaigners (senders) are able to better tailor their communication to the preferences and orientations of individual consumers and voters (receivers). This paper characterizes equilibrium persuasion through selective disclosure of the information that senders acquire about the preferences of receivers. We derive positive and normative implications depending on: the extent of competition among senders, whether receivers make individual or collective decisions, whether firms are able to personalize prices, and whether receivers are wary of the senders' incentives to become better informed. We find that privacy laws requiring senders to obtain consent to acquire information are beneficial when there is little or asymmetric competition among firms or candidates, when receivers are unwary, and when firms can price discriminate. Otherwise, policy intervention has unintended negative welfare consequences.


Regulating Cancellation Rights with Consumer Experimentation (with Roman Inderst and Sergey Turlo), EEA 2017 Meetings Paper.

Abstract: Embedding consumer learning about a product or service into a market environment, we find that equilibrium contracts induce too little returns or cancellations. Bilaterally efficient contracts neglect a pecuniary externality on other firms in the market. While it is then always socially optimal to impose a binding statutory minimum for the refund level, imposing a binding minimum return or cancellation period is only beneficial when competition is weak, but it backfires otherwise. In contrast to consumer protection policy, competition policy is always beneficial as it reduces the identified externality and leads to more returns, cancellations, and consumer experimentation. These clear-cut results are obtained in a model where we express consumer learning through a rotation of the distribution of consumers' time varying posterior valuation, which we show to hold for commonly used learning technologies. We also argue that this finding, as well as the identified market failure, are more broadly applicable. 



More information, citations, etc. can be found on my Google Scholar page. Information about the research workshop on "Dynamic incentive problems" which I organized jointly with Francesc Dilmé can be found here.