Money
The stock of assets that can be readily used to make transactions
Functions of money
Medium of exchange
Store of value
Unit of Account
Medium of exchange
Money is used to buy goods and services. It eliminates the need for barter by providing a commonly accepted means of payment
Store of value
Money transfers purchasing power from the present to the future. It allows individuals to save and defer consumption
Unit of account
Money is the standard unit by which everyone measures prices and values. It provides a common basis for comparing the value of different goods and services.
Barter economy
Goods are exchanged directly for other goods. Requires a double coincidence of wants where each party must want what the other has to offer, The number of pairwise prices needed for n goods is calculated as 2n(n-1).
Monetary Economy
Money is used as an intermediary to buy goods and services. It simplifies transactions as each good has a single price inters of money. Reduces transaction costs and promotes economic efficiency
Commodity money
A good, usually gold or silver, used as a medium of exchange. Has intrinsic value in other uses.
Commodity backed money
A medium of exchange with no intrinsic value. Its value is guaranteed by a promise that it can be converted into valuable goods e.g. the gold standard where each unit of currency can be exchanged for a specific quantity of gold
Fiat money
Money whose value derives entirely from its official status as a means of payment e.g. bank notes issued by central banks. Has no intrinsic value ; its acceptance is based on trust in the issuing authority.