Background: This paper explores the financial viability of eBay's Buyer Protection Plan. Methods: We explore their warranty model assuming exponential auction listing and claims times, under competing assumptions of Normal (classical portfolio theory) versus Paretian claims (industry practice)...

Market data for financial studies typically derives from either historical transactions or contemporaneous surveys of sentiment and perceptions. The research communities analyzing data from these opposing categories of source data see themselves as distinct, with advantages not shared by the...

We examine an infi nitely repeated game between a principal, who has the formal authority to decide on a project, and a biased agent, who is privately informed about what projects are available. The optimal relational contract speaks to how power is earned, lost, and retained. It shows that...

We develop a theory of blockchain governance. In our model, the proof-of-work system, which is the most common set of rules for validating transactions in blockchains, creates an industrial ecosystem with specialized suppliers of goods and services. We analyze the two-way interactions between...