Authors: Carl Chiarella; Roberto Dieci; Xue-Zhong He
Addresses: School of Finance and Economics, The University of Technology, Sydney, P.O. Box 123, Broadway, NSW 2007, Australia. ' Dipartimento di Matematica per le Scienze Economiche e Sociali (MatemateS), Università degli Studi di Bologna, Viale Q. Filopanti, 5, I-40126 Bologna, Italy. ' School of Finance and Economics, The University of Technology, Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
Abstract: This article surveys boundedly rational heterogeneous agent (BRHA) models of financial markets. We give particular emphasis to the role of the market clearing mechanism used, the utility function of the investors, the interaction of price and wealth dynamics, and calibration of this class of models. Due to agents| behavioural features and market noise, the BRHA class of models are both non-linear and stochastic. We show that BRHA models produce both a locally stable fundamental equilibrium corresponding to that of the standard paradigm, as well as instability with a consequent rich range of possible complex behaviours that are analysed by both simulation and deterministic bifurcation analysis. A calibrated model is able to reproduce quite well the stylised facts of financial markets. The BRHA framework seems able to better accommodate market features such as fat tails, volatility clustering, large excursions from the fundamental and bubbles than the standard financial market paradigm.
Keywords: bounded rationality; interacting heterogeneous agents; behavioural finance; nonlinear economic dynamics; asset prices; disequilibrium; financial markets; modelling; fat tails; volatility clustering; financial bubbles.
International Journal of Behavioural Accounting and Finance, 2011 Vol.2 No.2, pp.101 - 139
Published online: 17 Sep 2011 *Full-text access for editors Access for subscribers Purchase this article Comment on this article