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On Maximizing Diffusion Speed Over Social Networks With Strategic Users

On Maximizing Diffusion Speed Over Social Networks With Strategic Users

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On Maximizing Diffusion Speed Over Social Networks With Strategic Users

A variety of models have been proposed and ana-lyzed to understand how a new innovation (e.g., a technology, a product, or even a behavior) diffuses over a social network, broadly classified into either of epidemic-based or game-based ones. In this paper, we consider a game-based model, where each individual makes a selfish, rational choice in terms of its payoff in adopting the new innovation, but with some noise. We address the following two questions on the diffusion speed of a new innovation under the game-based model: 1) what is a good subset of individuals to seed for reducing the diffusion time significantly, i.e., convincing them to preadopt a new innovation and 2) how much diffusion time can be reduced by such a good seeding. For 1), we design near-optimal polynomial-time seeding algo-rithms for three representative classes of social network models, Erd ?os-Rényi, planted partition and geometrically structured graphs, and provide their performance guarantees in terms of approximation and complexity. For 2), we asymptotically quantifythe diffusion time for these graph topologies; further derive the seed budget threshold ab ove which the diffusion time is dramatically reduced, i.e., phase transition of diffusion time.Furthermore, based on our theoretical findings, we propose a practical seeding algorithm, called Practical Partitioning and Seeding (PrPaS) and demonstrate that PrPaS outperforms otherbaseline algorithms in terms of the diffusion speed over a real social network topology. We believe that our results provide new insights on how to seed over a social network depending on itsconnectivity structure, where individuals rationally adopt a new innovation.


 


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  • Model: PROJ7544
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This product was added to our catalog on Saturday 29 July, 2017.

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