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Model predicts growth, death of membership-based websites

Facebook is a proven success in what the late Nobel laureate Herbert Simon called "the marketplace of attention." A new model assesses the viability of websites and social networks in this new attention economy to predict which sites are sustainable and which are not. The model attempts to replicate the dynamics of membership sites, including the role of active users as catalysts of website activity, turning dormant website members into active users and keeping them active.
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