Heterogeneous beliefs among market participants can lead to questionable speculative trading that goes beyond any risk-sharing motives. We demonstrate that such unwarranted betting behavior in market equilibrium can be mitigated by introducing nonlinear pricing for ambiguous contracts, without...

Calls to boycott a foreign country aim to push a share of domestic consumers to cut their consumption of goods imported from the targeted country. How do boycotts differ from sanctions? Should boycotters target all of the country’s products, or should they focus on a restricted set of sectors?...

We develop a theory of tax reforms for a setting with multi-dimensional heterogeneity amongst taxpayers and multiple economic decisions that are all subject to fixed and variable costs. The theorems in this paper provide a complete characterization of the conditions under which Pareto- or...