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This is a scientific paper authored by Liu Kun and [http://leitang.net/ Lei Tang], and appeared in [http://www.cikm2011.org/ CIKM'11]. Below is the paper summary written by [http://malt.ml.cmu.edu/mw/index.php/User:Tahoang Tuan Anh]. == Citation == @inproceedings{Liu:2011:LBT:2063576.2063838, author = {Liu, Kun and Tang, Lei}, title = {Large-scale behavioral targeting with a social twist}, booktitle = {Proceedings of the 20th ACM international conference on Information and knowledge management}, series = {CIKM '11}, year = {2011}, isbn = {978-1-4503-0717-8}, location = {Glasgow, Scotland, UK}, pages = {1815--1824}, numpages = {10}, url = {http://doi.acm.org/10.1145/2063576.2063838}, doi = {10.1145/2063576.2063838}, acmid = {2063838}, publisher = {ACM}, address = {New York, NY, USA}, keywords = {advertising, behavioral targeting, large-scale data mining, social targeting, social-network analysis} } == Online Version == [http://leitang.net/papers/cikm2011-social-bt.pdf Large-Scale Behavioral Targeting with a Social Twist]. == Summary == This paper reports experiments on assessing the effectiveness of supervised and unsupervised learning methods in leveraging social data in [http://en.wikipedia.org/wiki/Behavioral_targeting behavioral targeting] problem. The experiments were conducted on a large scale dataset that contains information about users' activities and their social networks from ``a large IT company" (mostly Yahoo) in 14 weeks. User activities include users' web-browsing behavior such as the page visiting, ad clicking, searching, etc. User network is built based on instant messages exchanged among users. The resulting dataset includes of 180 million users and their behaviors in 60 consumer domains. To deal with the large scale of the dataset, all the experiments are implemented in [http://en.wikipedia.org/wiki/MapReduce Hadoop MapReduce] framework. The problem is formulated as a prediction task: given users'activities and their network first 10 weeks, predict users' activities in last 4 weeks. The key findings are as follows. * Knowledge about social network is helpful but mainly in the categories where users have strong [http://malt.ml.cmu.edu/mw/index.php/Class_Meeting_for_10-802_09/25/2012 homophily] * Social network features should be used incorporating with other standard features == Dicussion ==

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