The distribution of wealth in the presence of altruism for simple economic models

Details The distribution of wealth in the presence of altruism for simple economic models The distribution of wealth in the presence of altruism for simple economic models

2005-07-12

arxiv.org/abs/physics/0507093v1

Physics

Physics and Society

Accepted in Physica A: Statistical Mechanics and its Applications

Scientific paper

10.1016/j.physa.2005.07.001

We study the effect of altruism in two simple asset exchange models: the yard sale model (winner gets a random fraction of the poorer player's wealth) and the theft and fraud model (winner gets a random fraction of the loser's wealth). We also introduce in these models the concept of bargaining efficiency, which makes the poorer trader more aggressive in getting a favorable deal thus augmenting his winning probabilities. The altruistic behavior is controlled by varying the number of traders that behave altruistically and by the degree of altruism that they show. The resulting wealth distribution is characterized using the Gini index. We compare the resulting values of the Gini index at different levels of altruism in both models. It is found that altruistic behavior does lead to a more equitable wealth distribution but only for unreasonable high values of altruism that are difficult to expect in a real economic system.

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