Buyer-Optimal Algorithmic Recommendations

Shota Ichihashi and Alex Smolin

Papers from arXiv.org

Abstract: In markets where algorithmic data processing is increasingly prevalent, recommendation algorithms can substantially affect trade and welfare. We consider a setting in which an algorithm recommends a product based on its value to the buyer and its price. We characterize an algorithm that maximizes the buyer's expected payoff and show that it strategically biases recommendations to induce lower prices. Revealing the buyer's value to the seller leaves overall payoffs unchanged while leading to more dispersed prices and a more equitable distribution of surplus across buyer types. These results extend to all Pareto-optimal algorithms and to multiseller markets, with implications for AI assistants and e-commerce ranking systems.

Date: 2023-09, Revised 2025-06
New Economics Papers: this item is included in nep-com, nep-cta and nep-mic
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