In many cases, buyers are not informed about their valuations and rely on experts, who are informed but biased for overbidding. We study auction design when selling to such “advised buyers”. We show that a canonical dynamic auction, the English auction, has a natural equilibrium that...

One-size-fits-all recommendations are common in many contexts, including those with a widespread heterogeneity. We propose a model that rationalizes this phenomenon. An expert recommends publicly to two agents whether to adopt a policy. The expert is privately informed about agents' payoffs from...