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Concept
Real prices and ideal prices
Résumé
The distinction between real prices and ideal prices is a distinction between actual prices paid for products, services, assets and labour (the net amount of money that actually changes hands), and computed prices which are not actually charged or paid in market trade, although they may facilitate trade. The difference is between actual prices paid, and information about possible, potential or likely prices, or "average" price levels. This distinction should not be confused with the difference between "nominal prices" (current-value) and "real prices" (adjusted for price inflation, and/or tax and/or ancillary charges). It is more similar to, though not identical with, the distinction between "theoretical value" and "market price" in financial economics.
Ideal prices, expressed in money-units, can be "estimated", "theorized" or "imputed" for accounting, trading, marketing or calculation purposes, for example using the law of averages. Often the actual prices of real transactions are combined with assumed prices, for the purpose of a price calculation or estimate. Even if such prices therefore may not directly correspond to transactions involving actually traded products, assets or services, they can nevertheless provide "price signals" which influence economic behavior.
For example, if statisticians publish aggregated price estimates about the economy as a whole, market actors are likely to respond to this price information, even if it is far from exact, if it is based on a very large number of assumptions, and if it is later revised. The release of new GDP data, for instance, often has an immediate effect on stock market activity, insofar as it is interpreted as an indicator of whether and how fast the market – and consequently the incomes generated by it – is growing or declining.
Ideal prices are typically prices that would apply in trade, if certain assumed conditions apply (and they may not). The number of ideal prices used for calculations or signalling in the world vastly exceeds the number of real prices fetched.
Source officielle
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