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Revenue Non-monotonicity in Matching Markets

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  • Jason Hartline

Abstract

The Vickrey-Clarke-Groves (VCG) mechanism is infamously revenue non-monotone in combinatorial auctions. I.e., when a buyer increases their value for a bundle of items, the total auction revenue may decrease. Combinatorial auctions exhibit complementarities which broadly result in complexities in auction theory. This brief note shows that non-monotonicity in multi-item auctions is not a result of complementarities, and in fact, VCG is revenue non-monotone even in matching markets.

Suggested Citation

  • Jason Hartline, 2026. "Revenue Non-monotonicity in Matching Markets," Papers 2602.20439, arXiv.org.
    • Handle: RePEc:arx:papers:2602.20439
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    File URL: http://arxiv.org/pdf/2602.20439
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