# From Mad Men to Maths Men: Concentration and Buyer Power in Online Advertising

> Research article (American Economic Review, 2021) · cited 21× · AI/ML

**Wikidata**: [openalex:W2972224239](https://www.wikidata.org/wiki/openalex:W2972224239)  
**Source**: https://4ort.xyz/entity/from-mad-men-to-maths-men-concentration-and-buyer-power-in-online-advertising