Poncela Julia, Gómez-Gardeñes Jesús, Moreno Yamir
Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 May;83(5 Pt 2):057101. doi: 10.1103/PhysRevE.83.057101. Epub 2011 May 4.
In this work we study the effect of limiting the number of interactions (the associative capacity) that a node can establish per round of a prisoner's dilemma game. We focus on the way this limitation influences the level of cooperation sustained by scale-free networks. We show that when the game includes cooperation costs, limiting the associative capacity of nodes to a fixed quantity renders in some cases larger values of cooperation than in the unrestricted scenario. This allows one to define an optimum capacity for which cooperation is maximally enhanced. Finally, for the case without cooperation costs, we find that even a tight limitation of the associative capacity of nodes yields the same levels of cooperation as in the original network.
在这项工作中，我们研究了限制节点在每一轮囚徒困境博弈中能够建立的交互数量（关联能力）所产生的影响。我们关注这种限制影响无标度网络维持的合作水平的方式。我们表明，当博弈包含合作成本时，在某些情况下，将节点的关联能力限制为固定数量会产生比无限制场景下更大的合作值。这使得人们能够定义一个使合作得到最大增强的最优能力。最后，对于没有合作成本的情况，我们发现即使对节点的关联能力进行严格限制，产生的合作水平也与原始网络中的相同。
