TY  - JOUR
ID  - publications46764
UR  - http://tse-fr.eu/pub/127804
IS  - n° 2
A1  - Decarolis, Francesco
A1  - Goldmanis, Maris
A1  - Penta, Antonio
A1  - Shakhgildyan, Ksenia
Y1  - 2023/06//
N2  - Bid delegation to specialized intermediaries is common in internet ad auctions. When the same intermediary bids for competing advertisers, its incentive to coordinate client bids might alter the functioning of the auctions. This study develops a methodology to detect bid coordination and presents a strategy to estimate a bound on the search engine revenue losses imposed by bid coordination. When the method is applied to data from auctions held on a major search engine, coordination is detected in 55% of the cases of delegated bidding and the search engine's revenue loss ranges between 5.3% and 10.4%.
PB  - Blackwell Publishing
JF  - Journal of Industrial Economics
VL  - vol. 71
SN  - 0022-1821
TI  - Bid coordination in sponsored search auctions: detection methodology and empirical analysis
SP  - 570
AV  - none
EP  - 592
ER  -