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Stocks and Flows

Stocks and Flows

An approach to modelling complex systems where a system's behaviour is replicated by the interaction of stocks and flows of some arbitrary concept.


A stock is measured at a given moment in time, e.g. in accounting the values of assets and liabilties are recorded at a point in time on a balance sheet.


A flow is measured in units/time, e.g. in accounting the cash movement in a month.