Monetary disequilibrium

Monetary disequilibrium is the condition in which the supply of money in an economy does not match the demand for money at the prevailing price level, leading to coordination failures that cannot be resolved by price adjustments alone. When money is too scarce, agents cannot execute mutually beneficial trades; when money is too abundant, the price mechanism loses its informational function and the economy drifts into inflation. The concept is central to the disequilibrium economics of Robert Clower and Axel Leijonhufvud, who showed that monetary disequilibrium is not a temporary friction but a structural feature of economies that use money as a medium of exchange. In a monetary disequilibrium, quantity constraints replace price signals as the primary coordination mechanism, and the economy operates in a different dynamical regime than the one described by general equilibrium theory. The monetary disequilibrium view has been revived in modern macroprudential research, which recognizes that financial crises are not market failures but systemic phase transitions in the credit network — a rephrasing of the old insight that when the payment system breaks, the corridor collapses.

Monetary disequilibrium is not a market failure. It is the normal operating condition of a monetary economy, and the general equilibrium model is the special case that ignores it.