UTMD

Title: Whistleblowing (joint with Ayca Kaya and Anne-Katrin Roesler)   Abstract: We study a dynamic game of whistleblowing among agents who independently receive evidence over time. Evidence arrives privately, and once an agent is informed, she may choose at any moment to disclose it (i.e., whistleblow) or to delay reporting. Reporting entails a cost (e.g., risk of retaliation) but yields a benefit if corroborated by another report. Agents prefer to corroborate existing reports rather than be the first to disclose. If no other agent holds evidence at the time of report, the payoff from reporting is negative. As a result, agents delay in hopes of free-riding on others’ disclosures and […]

Title: Arrow's theorem and strategy-proofness. A nonstandard approach Abstract: The well-known theorem of Arrow states that if a social choice rule satisfies certain natural properties then the corresponding voting mechanism is dictatorial. This fact is often used to illustrate the limits of democracy. A closely related result is the one by Gibbard and Satterthwaite showing that nonmanipulable voting mechanisms (with more than two real alternatives) must also be dictatorial. A standard proof is a reduction to Arrow's theorem.