By S. Muthukrishnan (auth.), Stefano Leonardi (eds.)

ISBN-10: 3642108415

ISBN-13: 9783642108419

This publication constitutes the refereed lawsuits of the fifth foreign Workshop on web and community Economics, WINE 2009, held in Rome, Italy, in December 2009.

The 34 ordinary and 29 brief revised complete papers offered including three invited talks have been conscientiously reviewed and chosen from 142 submissions. The papers tackle a variety of subject matters in theoretical laptop technology, networking and safety, economics, arithmetic, sociology, and administration sciences dedicated to the research of difficulties bobbing up within the web and the global net, akin to public sale algorithms, computational advertisements, common and majority equilibrium, coalitions, collective motion, economics features of protection and privateness in allotted and community computing, algorithmic layout and online game idea, info economics, community video games, rate dynamics, and social networks.

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Extra resources for Internet and Network Economics: 5th International Workshop, WINE 2009, Rome, Italy, December 14-18, 2009. Proceedings

Example text

In this game there are three unweighted players, and each player i has two possible strategies: the vertical three edges (denoted by Ai ) and another path (denoted by Bi ). The following sequence of moves constitutes a cycle in the best response dynamics: (A1 , A2 , A3 ) → (B1 , A2 , A3 ) → (B1 , B2 , A3 ) → (B1 , B2 , B3 ) → (A1 , B2 , B3 ) → (A1 , A2 , B3 ) → (A1 , A2 , A3 ). It is easy to verify that the remaining configurations (A1 , B2 , A3 ) and (B1 , A2 , B3 ) are no Nash equilibria either.

506. Proof. We use a matrix b11 b12 b21 b22 to denote the following instance with two machines and two tasks task 1 task 2 machine 1 b11 b12 . machine 2 b21 b22 Now we consider the following distribution of 12 instances: – – – 11 11 a1 , , , a1 1a 11 1b 1 1b b1 , , , 1 b1 1 1b b 1 1 b 1 a1 b 1 , , 1 1 , 1 b 1 1 a a 1a , each with probability p1 ; 11 1 b 1 , each with probability p ; 2 1b 1 a 1 , each with probability p . 3 1 b a, b, p1 , p2 , p3 are parameters to be specified later and satisfy 1 ≤ b ≤ 2 ≤ a and p1 + p2 + p3 = 1/4.

J + dej − 1 and j = 1, . . , l. This is a regular congestion game with latencies given by the time costs. Hence, results on the existence of Nash equilibria and the price of anarchy carry over. Corollary 14. Network congestion games with time-dependent costs are equivalent to a class of regular congestion games. In particular, there is a pure Nash equilibrium in every game, and any better-response dynamics converges. However, as the standard congestion game obtained by this reduction might have a large number of resources and as it is not necessarily a network congestion game, complexity results do not carry over.

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Internet and Network Economics: 5th International Workshop, WINE 2009, Rome, Italy, December 14-18, 2009. Proceedings by S. Muthukrishnan (auth.), Stefano Leonardi (eds.)


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