A new approach to business fluctuations: heterogeneous interacting agents, scaling laws and financial fragility
Gatti, Domenico Delli · Di Guilmi, Corrado · Gaffeo, Edoardo · Giulioni, Gianfranco · Gallegati, Mauro · Palestrini, Antonio
Original · EN
In this paper we discuss a scaling approach to business fluctuations. Our starting point consists in recognizing that concepts and methods derived from physics have allowed economists to (re)discover a set of stylized facts which have to be satisfactorily accounted for in their models. Standard macroeconomics, based on a reductionist approach centered on the representative agent, is definitely badly equipped for this task. On the contrary, we show that a simple financial fragility agent-based model, based on complex interactions of heterogeneous agents, is able to replicate a large number of scaling type stylized facts with a remarkable high degree of statistical precision.
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