Problem
Research questions and friction points this paper is trying to address.
economic instability
financial crises
non-equilibrium dynamics
market bubbles
economic equilibrium
Non-Equilibrium Economics: A Physicist's Point of View
🤖 AI Summary
This study challenges the equilibrium paradigm of mainstream economics by investigating the endogenous origins of bubbles, crises, and inequality in economic systems. Drawing on complex systems theory, the authors develop a non-equilibrium dynamical “toy” model that integrates nonlinear dynamics and self-organized criticality to uncover three key mechanisms: path-dependent multiple equilibria, chaotic oscillations arising from dynamically inaccessible equilibria, and fragile stability induced by self-organized criticality. Remarkably, the model reproduces excessive volatility, endogenous crises, inflationary spirals, and persistent inequality—all without exogenous shocks—thereby offering a novel non-equilibrium explanation for macroeconomic instability and prompting a critical re-evaluation of conventional equilibrium-based frameworks.
📝 Abstract
Financial and economic history is strewn with bubbles and crashes, booms and busts, crises and upheavals of all sorts. Understanding the origin of these events is arguably one of the most important problems in economic theory: are economies intrinsically unstable, and can one ``stabilize unstable economies''? In this review I argue, from a physicist's vantage point, that the concept of equilibrium -- so central to mainstream economic thinking -- is likely to be the exception rather than the rule in large, complex, interacting systems. Drawing on a series of stylized ``toy'' models, I show how excess volatility, endogenous crises and crashes, inflation swells and persistent inequalities can all emerge naturally from genuinely out-of-equilibrium dynamics, without invoking large exogenous shocks. Three generic mechanisms recur throughout: trapping in a multiplicity of history-dependent equilibria; the impossibility of dynamically reaching equilibrium, leading to oscillations and chaos; and the spontaneous evolution towards fragile, marginally stable states -- the self-organized criticality paradigm. I stress that these are phenomenological scenarios rather than calibrated theories: there is, at this stage, no ``smoking gun''. But the burden of proof, I contend, should be on the equilibrium camp.
Innovation
Methods, ideas, or system contributions that make the work stand out.
non-equilibrium dynamics
self-organized criticality
endogenous crises
history-dependent equilibria
economic instability
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