INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
Networks effects on a conservative exchanges market model
L. BRAUNSTEIN; P. A. MACRI; J. R. IGLESIAS
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
ELSEVIER SCIENCE BV
Lugar: Amsterdam; Año: 2013 vol. 392 p. 1788 - 1788
Many models of market dynamics make use of the idea of conservative wealth exchangesamong economic agents. A few years ago an exchange model using extremal dynamics wasdeveloped and a very interesting result was obtained: a self-generated minimum wealth orpoverty line. On the other hand, the wealth distribution exhibited an exponential shape asa function of the square of the wealth. These results have been obtained both consideringexchanges between nearest neighbors or in a mean field scheme. In the present paperwe study the effect of distributing the agents on a complex network. We have consideredarchetypical complex networks: ErdösRényi random networks and scale-free networks.The presence of a poverty line with finite wealth is preserved but spatial correlationsare important, particularly between the degree of the node and the wealth. We presenta detailed study of the correlations, as well as the changes in the Gini coefficient, thatmeasures the inequality, as a function of the type and average degree of the considerednetworks.