Open Problems in the Display Ads Market Place
summary
Publishers use mediation that runs chains of length 50 and calls the same demand source many times, often sequentially at falling reserves, creating a non‑transparent Dutch auction where detection is hard. Each node can add 200–500 ms per node and forces ad networks to run repeated internal auctions, inflating system cost and hurting advertiser ROI. First‑price migration breaks simple reserve logic, AB tests miss long‑run bidder responses, and practical fixes under discussion include bid‑translation, dashboard mechanisms and formal equilibrium models.
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