By Robert P. Murphy In a money economy, the money commodity is on one side of every transaction, and hence reduces the number of relevant prices. The direct exchange ratio between any two commodities can easily be computed from their respective money prices. The "price" or purchasing power of money is the array of goods and services for which a unit of money can be exchanged.
Individual supply and demand schedules in a money economy are determined by the same principles applicable to a barter economy. An individual's value scale contains units of the money commodity as well as all other commodities and services, and the individual will engage in market exchanges to achieve the bundle of goods (including units of the money commodity) that he or she believes will yield the greatest utility. There have been various attempts to gauge the total "surplus" that individuals enjoy from the existence of markets, but these procedures suffer from methodological errors. Individuals benefit from voluntary exchanges, but it is nonsensical to ask how much they benefit, because utility is not a cardinal magnitude.
The utility from selling a good for money is the value of the most highly ranked use to which the additional money can be devoted (whether to… (Read more)
Source: Mises.org
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