Mauro Gallegati

Alan P. Kirman

Matteo Marsili

The economy is examined by the authors as a complex interactive system. The emphasis is on the direct interaction between agents rather than on the indirect and autonomous interaction through the market mechanism. Contributions from economists and physicists emphasise the consequences for aggregate behaviour of the interaction between agents with limited rationality. Models of financial markets which exhibit many of the stylised facts of empirical markets such as bubbles, herd behaviour and long memory are presented. This includes contributions on bargaining, buyer-seller relations, the evolution of economic networks and several aspects of macro-economic behaviour. This book will be of interest to all those interested in the foundations of collective social and economic behaviour and in particular, to those concerned with the dynamics of market behaviour and recent applications of physics to economics.

Essays in Economics and Econophysics

The Complex Dynamics of Economic Interaction

Gilles Teyssière

Assembles three different strands of long memory analysis: statistical literature on the properties of, and tests for, LRD processes; mathematical literature on the stochastic processes involved; and models from economic theory providing plausible micro foundations for the occurrence of long memory in economics.

Long Memory in Economics

Massimo Salzano

“In some ways, the e?ect of achieving understanding is to reverse completely our initial attitude of mind. For everyone starts (as we have said) by being perplexed by some fact or other: for instance... the fact that the diagonal of a square is incommensurable with the side. Anyone who has not yet seen why the side and the diagonal have no common unit regards this as quite extra- dinary. But one ends up in the opposite frame of mind... for nothing would so much ?abbergast a mathematician as if the diagonal and side of a square were to become commensurable”. [Aristotele] This is the ?rst volume of a new series entitled “New Economic Windows”. Each volume in the series will, we hope, provide pointers towards a better understanding of the nature of economic phenomena and help to “reverse our initial state of mind” as economists. As H. Simon observed, Economics must be considered a “hard”, (in the sense of di?cult rather than precise), science. As he cogently argued, the problems dealt with are so complex they “cannot simply be reduced to analytically solvable models or decomposed into sepa- 1 rate sub processes”. In this he was following on from Einstein who, many years earlier, when asked why he had not turned his attention to economics said that he found it too di?cult a subject to handle scienti?cally.

Alan P. Kirman

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