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Incentive-Compatible Collusion-Resistance via Posted Prices

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arxiv 2412.20853 v1 pith:YCXTQBVZ submitted 2024-12-30 cs.GT econ.TH

classification cs.GTecon.TH
keywords incentive-compatibleclasscollusion-resistancemechanismsnotionstransactionanalyzebidder
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We consider a refinement to the notions of collusion-resistance in transaction fee mechanisms. In particular, we require that the collusion is by itself incentive-compatible and individually rational to all of its participants. We then study the structural properties of these notions, and importantly, characterize the class of collusion-resistant and incentive-compatible transaction fee mechanisms in the single bidder case, and show that this is exactly the class of posted-price where the price is not too prohibitive. We analyze welfare and revenue implications, as well as the shape of the solution space, for both regular and non-regular distributions.

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  1. Order Auctions with Private Position Preferences

    cs.GT 2026-08 conditional novelty 7.0 of 10

    Adding one demand bit to a two-slot first-price auction raises the guaranteed equilibrium welfare from 1/2 to 1-1/e of the efficient benchmark.

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