John Locke - Influence - On Price Theory

On Price Theory

Locke’s general theory of value and price is a supply and demand theory, which was set out in a letter to a Member of Parliament in 1691, titled Some Considerations on the Consequences of the Lowering of Interest and the Raising of the Value of Money. Supply is quantity and demand is rent. “The price of any commodity rises or falls by the proportion of the number of buyer and sellers.” and “that which regulates the price... is nothing else but their quantity in proportion to their rent.” The quantity theory of money forms a special case of this general theory. His idea is based on “money answers all things” (Ecclesiastes) or “rent of money is always sufficient, or more than enough,” and “varies very little...” Regardless of whether the demand for money is unlimited or constant, Locke concludes that as far as money is concerned, the demand is exclusively regulated by its quantity. He also investigates the determinants of demand and supply. For supply, goods in general are considered valuable because they can be exchanged, consumed and they must be scarce. For demand, goods are in demand because they yield a flow of income. Locke develops an early theory of capitalisation, such as land, which has value because “by its constant production of saleable commodities it brings in a certain yearly income.” Demand for money is almost the same as demand for goods or land; it depends on whether money is wanted as medium of exchange or as loanable funds. For medium of exchange “money is capable by exchange to procure us the necessaries or conveniences of life.” For loanable funds, “it comes to be of the same nature with land by yielding a certain yearly income ... or interest.”