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| Content Provider | ACM Digital Library |
|---|---|
| Author | Kempe, David David, Mary Chen, Po-An |
| Abstract | In this paper, we study the vaccination of graphs against the outbreak of infectious diseases, in the following natural model generalizing a model by Aspnes et al.: An infectious disease breaks out at a random node of the graph and propagates along the edges of the graph. Vaccinated nodes cannot be infected, nor pass on the infection, whereas all other nodes do. The decisions on which nodes get vaccinated must be made before the random outbreak location is known. There is a cost associated with vaccination and a different cost with getting infected. In this model, we provide two results. First, we improve the approximation guarantee for finding the best vaccination strategy from $O(log^{1.5}$ n) to O(log z) (where z is the support size of the outbreak distribution), by rounding a natural linear program with region-growing techniques. Second, we analyze the impact of autonomy on the part of the nodes: while a benevolent authority may suggest which nodes should be vaccinated, nodes may opt out after being chosen. We analyze the "Price of Opting Out" in this sense under partially altruistic behavior. Individuals base their decisions on their own cost and the societal cost, the latter scaled by some factor ß. If the altruism parameter is ß=0, it is known that the Price of Anarchy and Price of Stability can be Θ(n). We show that with positive altruism, Nash Equilibria may not exist, but the Price of Opting Out is at most 1/ß (whereas the Price of Anarchy can remain at Θ(n)). |
| Starting Page | 179 |
| Ending Page | 188 |
| Page Count | 10 |
| File Format | |
| ISBN | 9781605588223 |
| DOI | 10.1145/1807342.1807370 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2010-06-07 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Anarchy Inoculation Approximation Stability Vaccination Selfishness Altruism |
| Content Type | Text |
| Resource Type | Article |
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