"Sequential Mechanisms for Evidence Acquisition," with Elchanan Ben-Porath and Eddie Dekel, June 2023, current draft April 2024.  (Supplemental Appendix.)

“Mechanism Design for Acquisition of/Stochastic Evidence," with Elchanan Ben-Porath and Eddie Dekel, first preliminary draft September 2019.

• Current draft, March 2025.

• Previous draft, December 2023.

   I keep the previous draft available as it contains our result on value of commitment.  That theorem is being moved to a new paper (in progress) and so has been removed from the current draft.

“An Elementary Proof of the Optimality of Threshold Mechanisms," first draft June 2015, current draft July 2015.

This paper contains a much simpler proof of the main result in Ben-Porath, Dekel, and Lipman, "Optimal Allocation with Costly Verification."  Yes, as Ricky Vohra says, the proof in the AER paper is a mess, but, unlike Ricky's proof, this very simple one doesn't assume finitely many IID types.  (But I agree with Ricky about the reduced form...  Ah, well, live and learn.)