We consider the problem of a principal who wishes to contract with a privately informed agent and is not able to commit to not renegotiating any outcome of any mechanism. We provide a general characterization of renegotiation-proof outcomes. We apply the solution to a setting with a continuous...

We analyze the contracting problem of a principal who faces an agent with private information and cannot commit to not renegotiating a chosen contract. We model this by allowing the principal to propose new contracts any number of times after observing the contract choice of the agent. We...

Procurement regulation aimed at curbing discrimination requires equal treatment of sellers. However, Deb and Pai (2017) show that such regulation imposes virtually no restrictions on the ability to discriminate. We propose a simple rule - imitation perfection - that restricts discrimination...

Die Monopolkommission hat in ihrem Hauptgutachten 'Wettbewerb 2016' die Wettbewerbssituation auf Verkehrsflughäfen betrachtet. Sie bemängelt dabei insbesondere die Doppelrolle der öffentlichen Hand, die sowohl Eigentümer als auch Aufsichtsbehörde 'ihrer' Flughäfen ist. Die Kommission...

This paper presents an analysis of the recent developments of average market power in Europe by using a broad firm-level database for EU member states. To indicate competitive pressure at the firm-level, markups are estimated following De Loecker (2011), and De Loecker and Warzynski (2012). The...

Das Land Niedersachsen gehört zu den größten Anteilseignern beim VW-Konzern, die Bundesregierung gesteht Air Berlin Bürgschaften zu. Sind dies wettbewerbsverzerrende politische Interventionen, die aus den besonderen Beziehungen zwischen Wirtschaft und Politik entstehen, oder nur das Setzen...

We examine the strategic interaction in the market for physician services when the total budget for reimbursement is fixed. We show that this prospective payment system involves ƒ{ compared to a fee-for-service remuneration system ƒ{ a severe coordination problem, which potentially leads to...

During the recent sales of UMTS licenses in Europe some countries used auctions while others resorted to so-called Beauty Contests. There seems to be a wide consensus among economists that in these and other contexts like privatisation an auction is the better selling mechanism. However, why...

We study the impact of insurance on the amount of fraud in a physician-patient relationship. In a market for credence goods, where prices are regulated by an authority, physicians act as experts. Due to their informational advantage, physicians have an incentive to cheat by inducing...