Reputation and Trust in Social Commerce
讲座名称：
Reputation and Trust in Social Commerce
讲座时间：
2011-07-12
讲座人：
Ashish Goel
形式：
校区：
兴庆校区
实践学分：
讲座内容：
Title（讲座名称）：Reputation and Trust in Social Commerce
Time（讲座时间）：2011-7-12 09:00AM
Location（讲座地点）：主楼C306室
Abstract（讲座内容）：
Automated reputation and trust systems play an ever increasing role in the emerging networked society. We will first describe a model of networked trust that functions by exchange of IOUs among nodes. Informally, every node acts as a bank and prints its own currency, which is then used to purchase services within the network. Such "trust networks" are robust to infiltration, since any node only accepts currency printed by other nodes that it directly trusts. We will analyze the liquidity of this model, i.e., the number of transactions that such a network can support. We will show that in many interesting cases, the liquidity of these trust networks is comparable to a system where currency is issued by a single centralized bank. We will then discuss existing reputation systems, focusing on efficient computation of PageRank in social networks, its use as a recommendation system, and its vulnerability to gaming.
Preliminary versions of the results we will describe are at http://arxiv.org/abs/1006.2880 (joint with Bahman Bahmani and Abdur Chowdhury), and http://arxiv.org/abs/1007.0515 (joint with Pranav Dandekar, Ramesh Govindan, and Ian Post). They appeared (will appear) in VLDB 2011/EC 2011 respectively.
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