Abstract:

Free riding behaviors are very common in the social network sites (SNS), that is, some users contribute no or few content to the “public resource pool”, but enjoy the contents other users contributed in the resource pool for free Based on the game theory, an individual contributing behavior model is established Through observing the dynamic process of users’ contributing behavior, the inevitability of users’ free riding problem is explained, which lays a foundation for the incentive mechanism of users’ contributing behavior

Key words: social network sites, free riding, game, behavior model