Abstract
We introduce a novel computational model for single-keyword auctions in sponsored search, which models explicitly externalities among advertisers, an aspect that has not been fully reflected in the existing models, and is known to affect the behavior of real advertisers. Our model takes into account both positive and negative correlations between any pair of advertisers, so that the click-through rate of an ad depends on the identity, relative order and distance of other ads appearing in the advertisements list. In the proposed model we present several computational results concerning the Winner Determination problem for Social Welfare maximization. These include hardness of approximation and polynomial time exact and approximation algorithms. We conclude with an evaluation of the Generalized Second Price mechanism in presence of externalities.
Research partially supported by an NTUA Basic Research Grant (PEBE 2009), EPSRC grant EP/F069502/1, and DFG grant Kr 2332/1-3 within Emmy Noether Program.
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References
Aggarwal, G., Feldman, J., Muthukrishnan, S., Pal, M.: Sponsored Search Auctions with Markovian Users. In: Papadimitriou, C., Zhang, S. (eds.) WINE 2008. LNCS, vol. 5385, pp. 621–628. Springer, Heidelberg (2008)
Aggarwal, G., Goel, A., Motwani, R.: Truthful auctions for pricing search keywords. In: Proceedings of 7th ACM Conference on Electronic Commerce (EC), pp. 1–7. ACM, New York (2006)
Alon, N., Yuster, R., Zwick, U.: Color Coding. Journal of the ACM 42, 844–856 (1995)
Anshelevich, E., Dasgupta, A., Kleinberg, J.M., Tardos, E., Wexler, T., Roughgarden, T.: The Price of Stability for Network Design with Fair Cost Allocation. SIAM Journal on Computing 38(4), 1602–1623 (2008)
Ashlagi, I., Krysta, P., Tennenholtz, M.: Social Context Games. In: Papadimitriou, C., Zhang, S. (eds.) WINE 2008. LNCS, vol. 5385, pp. 675–683. Springer, Heidelberg (2008)
Athey, S., Ellison, G.: Position Auctions with Consumer Search. Quartetly Journal of Economis (to appear, 2011)
Berman, P.: A d/2 Approximation for Maximum Weight Independent Set in d-Claw Free Graphs. In: Halldórsson, M.M. (ed.) SWAT 2000. LNCS, vol. 1851, pp. 214–219. Springer, Heidelberg (2000)
Berman, P., Krysta, P.: Optimizing misdirection. In: Proceedings of the ACM-SIAM Symposium on Discrete Algorithms (SODA), pp. 192–201. ACM, New York (2003)
Caragiannis, I., Kaklamanis, C., Kanellopoulos, P., Kyropoulou, M.: On the Efficiency of Equilibria in Generalized Second Price Auctions. In: Proceedings of the ACM Conference on Electronic Commerce (EC), pp. 81–90. ACM, New York (2011)
Chen, P., Kempe, D.: Bayesian Auctions with Friends and Foes. In: Mavronicolas, M., Papadopoulou, V.G. (eds.) SAGT 2009. LNCS, vol. 5814, pp. 335–346. Springer, Heidelberg (2009)
Cramton, P., Shoham, Y., Steinberg, R.: Combinatorial Auctions. MIT Press, Cambridge (2006)
Craswell, N., Zoeter, O., Taylor, M., Ramsey, B.: An experimental comparison of click position-bias models. In: WSDM 2008: Proceedings of the International Conference on Web Search and Web Data Mining, pp. 87–94. ACM, New York (2008)
Das, A., Giotis, I., Karlin, A., Mathieu, C.: On the Effects of Competing Advertisements in Keyword Auctions (2008) (unpublished manuscript)
Edelman, B., Ostrovsky, M., Schwarz, M.: Internet advertising and the generalized second price auction: Selling billions of dollars worth of keywords. American Economic Review 97(1), 242–259 (2007)
Ghosh, A., Mahdian, M.: Externalities in Online Advertising. In: Proceedings of the 17th International World Wide Web Conference (WWW), pp. 161–168. ACM, New York (2008)
Giotis, I., Karlin, A.R.: On the equilibria and efficiency of the GSP mechanism in keyword auctions with externalities. In: Papadimitriou, C., Zhang, S. (eds.) WINE 2008. LNCS, vol. 5385, pp. 629–638. Springer, Heidelberg (2008)
Gomes, R., Immorlica, N., Markakis, E.: Externalities in Keyword Auctions: an empirical and theoretical assessment. In: Leonardi, S. (ed.) WINE 2009. LNCS, vol. 5929, pp. 172–183. Springer, Heidelberg (2009)
Jeziorski, P., Segal, I.: What makes them click: Empirical analysis of consumer demand for search advertising. Working paper (Department of Economics, Stanford University (2009)
Kempe, D., Mahdian, M.: A Cascade Model for Externalities in Sponsored Search. In: Papadimitriou, C., Zhang, S. (eds.) WINE 2008. LNCS, vol. 5385, pp. 585–596. Springer, Heidelberg (2008)
Kuminov, D., Tennenholtz, M.: User Modeling in Position Auctions: Re-Considering the GSP and VCG Mechanisms. In: Proceedings of the 8th International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS), pp. 273–280. ACM, New York (2009)
Leme, R.P., Tardos, E.: Pure and Bayes-Nash Price of Anarchy for Generalized Second Price Auction. In: Proceedings of the 51th Annual IEEE Symposium on Foundations of Computer Science (FOCS), pp. 735–744. IEEE, Los Alamitos (2010)
Nisan, N., Roughgarden, T., Tardos, É., Vazirani, V.: Algorithmic Game Theory. Cambridge University Press, New York (2007)
Papadimitriou, C., Yannakakis, M.: The Travelling Salesman Problem with Distances One and Two. Mathematics of Operations Research 18(1), 1–11 (1993)
Varian, H.R.: Position auctions. International Journal of Industrial Organization 25(6), 1163–1178 (2007)
Vickrey, W.: Counterspeculation, Auctions and Competitive Sealed Tenders. Journal of Finance, 8–37 (1961)
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Fotakis, D., Krysta, P., Telelis, O. (2011). Externalities among Advertisers in Sponsored Search. In: Persiano, G. (eds) Algorithmic Game Theory. SAGT 2011. Lecture Notes in Computer Science, vol 6982. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24829-0_11
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