Money is an intermediary that serves as a medium of exchange, unit of account, standard of deferred payment and a store of value. Money is one of the central topics studied in economics. There have been many historical arguments regarding the combination of these four functions, some arguing that they need more separation and that a single unit is insufficient to deal with them all. These arguments are covered in financial capital which is a more general and inclusive term for all liquid instruments, whether or not they are a uniformly recognized tender.

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