An interesting result in ECONOMICS related to our forum activities.
Mình đang học bài báo này, thấy quá đúng so với hoạt động của forums, đặc biệt là forum chia sẻ resources như là PhDvn. Có lẽ việc khuyến khích tất cả members chia sẻ là điều không khả thi và không bao giờ thực hiện được. Thật ra hiện tượng này xãy ra nhiều trong communications sytems như là P2P networks. Có những users gọi là free-riders, chỉ lấy resources mà không share bao giờ. Đọc bài báo thấy interesting khi nó dùng game gủng giải thích.
Không biết trong đây có ai làm hướng nghiên cứu này không.
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Some conclusions:
1. The law of the few refers to the following social phenomenon: a large majority of individuals get most of the information needed for their decisions from a very small subset of the group, viz., the influencers.
Individuals often have to make a choice between alternatives whose advantages are imperfectly known. In order to make an informed decision, they personally acquire information and gather information through social contacts. Personal acquisition of information is costly; similarly, creating and maintaining personal contacts takes time and resources. Rational individuals therefore compare the relative costs of these different sources of information. This paper explores the implications of such individual choices for social communication and the aggregate information available in a society.
Our point of departure is a series of empirical studies about information acquisition and communication in social groups. The classical early work of Paul F. Lazarsfeld, Bernard Berelson, and Hazel Gaudet 1948 and Elihu Katz and Paul F. Lazersfeld 1955 investigated the impact of personal contacts and mass media on voting and consumer choice with regard
to product brands, films and fashion changes. They found that personal contacts play a dominant role in disseminating information which in turn shapes individuals’ decisions. In particular, they identified 20 percent of their sample of 4000 individuals as the primary source of information for the rest. Similarly, Lawrence F. Feick and Linda L. Price 1987 found that
25 percent of their sample of 1400 individuals acquired a great deal of information about food, household goods, nonprescription drugs and beauty products and that they were widely accessed by the rest. Research on virtual social communities reveals a similar pattern of communication. Jun Zhang, Mark S. Ackerman and Lada Adamic 2007 study the Java Forum: an on-line community of users who ask and respond to queries concerning Java. They identify 14000 users and find that 55 percent of these users only ask questions, 12 percent both ask and answer queries, and about 13 percent only provide answers.....
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An interesting result in ECONOMICS related to our forum activities. 
