期刊名称：International Journal of Economics and Finance Studies
电子版ISSN：1309-8055
出版年度：2012
卷号：4
期号：1
出版社：Social Sciences Research Society
摘要：At the presence of network externality, the value of a product or service is dependent on the number of others using it. This means that the more social network has subscribers, the greater its value. Metcalfe’s law states that network value is proportional to the number of users in square. Reed's law takes into account the possibility of groups’ formation. In this case, network value scales exponentially with the size of the network. Odlyzko is much more moderate. He argues that the incremental value of adding one person to network of n people is approximately the n-th harmonic number. From early ages of television Sarnoff stated that the value of a broadcast network is proportional to the number of viewers. This paper deals with the problem of determining the value of such social networks as Facebook, Twitter, LinkedIn etc. as function of the number of users and other parameters.
