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Economics. Dr. Pass Christopher
Читать онлайн.Название Economics
Год выпуска 0
isbn 9780007556700
Автор произведения Dr. Pass Christopher
Жанр Зарубежная деловая литература
Издательство HarperCollins
The extent of deindustrialization in the UK was even more marked in the early 1980s because of Britain’s artificially high exchange rate, bolstered by UK oil exports, which caused Britain to lose overseas markets. See STRUCTURE OF INDUSTRY, STRUCTURAL UNEMPLOYMENT.
Fig. 38 Deindustrialization. The distribution of gross national product shows how the industrial sector in advanced economics grows more slowly than the service sector. The figures for industry include those for manufacturing. Source: World Development Report, World Bank, 2004.
delivered pricing the charging of a PRICE for a product that includes the cost of transporting the product from the manufacturer to the customer. The delivered prices quoted by a manufacturer might accurately reflect the actual costs of transportation to different areas, or alternatively, discriminatory prices might be used to cross-subsidize areas in order to maximize sales across the country. See BASING POINT PRICE SYSTEM.
delivery note a document sent by a supplier to a customer at the time when products are supplied that itemizes the physical quantities of product supplied. Thereafter an INVOICE is usually sent to the customer showing the money value of products supplied. Compare STATEMENT OF ACCOUNT.
demand or effective demand the WANT, need or desire for a product backed by the money to purchase it. In economic analysis, demand is always based on ‘willingness and ability to pay’ for a product, not merely want or need for the product. CONSUMERS’ total demand for a product is reflected in the DEMAND CURVE. Compare SUPPLY.
demand curve a line showing the relationship between the PRICE of a PRODUCT or FACTOR OF PRODUCTION and the quantity DEMANDED per time period, as in Fig. 39.
Most demand curves slope downwards because (a) as the price of the product falls, consumers will tend to substitute this (now relatively cheaper) product for others in their purchases; (b) as the price of the product falls, this serves to increase their real income, allowing them to buy more products (see PRICE EFFECT, INCOME EFFECT, SUBSTITUTION EFFECT). In a small minority of cases, however, products can have an UPWARD-SLOPING CURVE.
The slope of the demand curve reflects the degree of responsiveness of quantity demanded to changes in the product’s price. For example, if a large reduction in price results in only a small increase in quantity demanded (as would be the case where the demand curve has a steep slope) then demand is said to be price inelastic (see PRICE-ELASTICITY OF DEMAND).
The demand curve interacts with the SUPPLY CURVE to determine the EQUILIBRIUM MARKET PRICE. See DEMAND FUNCTION, DEMAND CURVE (SHIFT IN), DIMINISHING MARGINAL UTILITY, MARGINAL REVENUE PRODUCT.
Fig. 39 Demand curve. Demand is the total quantity of a good or service that buyers are prepared to purchase at a given price. Demand is always taken to be effective demand, backed by the ability to pay, and not just based on want or need. The typical market demand curve slopes downwards from left to right, indicating that as price falls more is demanded (that is, a movement along the existing demand curve). Thus, if price falls from OP1 to OP2, the quantity demanded will increase from OQ1 to OQ2.
demand curve (shift in) a movement of the DEMAND CURVE from one position to another (either left or right) as a result of some economic change other than price. A given demand curve is always drawn on the CETERIS PARIBUS assumption that all the other factors affecting demand (income, tastes, etc.) are held constant. If any of these changes, however, then this will bring about a shift in the demand curve. For example, if income increases, the demand curve will shift to the right, so that more is now demanded at each price than formerly. See Fig. 40. See also DEMAND FUNCTION, INCOME-ELASTICITY OF DEMAND.
Fig. 40 Demand curve (shift in). An increase in income shifts the demand curve D1D1 to D2D2, increasing the quantity demanded from OQ1, to OQ2. The magnitude of this shift depends upon the INCOME ELASTICITY OF DEMAND for the product.
demand deposit see BANK DEPOSIT, COMMERCIAL BANK.
demand elasticity see ELASTICITY OF DEMAND.
demand for a factor input see DERIVED DEMAND.
demand function a form of notation that links the DEPENDENT VARIABLE, quantity demanded (Qd), with various INDEPENDENT VARIABLES that determine quantity demanded such as product price (P), income (Y), prices of substitute products (Ps), advertising (A), etc.:
Qd = f(P, Y, Ps, A, etc)
Changes in any of these independent variables will affect quantity demanded, and if we wish to investigate the particular effect of any one of these variables upon quantity demanded, then we could (conceptually) hold the influence of the other independent variables constant (CETERIS PARIBUS), whilst we focus upon the particular effects of that independent variable. See DEMAND CURVE, DEMAND CURVE (SHIFT IN).
demand management or stabilization policy
The control of the level of AGGREGATE DEMAND in an economy, using FISCAL POLICY and MONETARY POLICY to moderate or eliminate fluctuations in the level of economic activity associated with the BUSINESS CYCLE. The general objective of demand management is to ‘fine-tune’ aggregate demand so that it is neither deficient relative to POTENTIAL GROSS NATIONAL PRODUCT (thereby avoiding a loss of output and UNEMPLOYMENT) nor overfull (thereby avoiding INFLATION).
An unregulated economy will tend to go through periods of depression and boom as indicated by the continuous line in Fig. 41. Governments generally try to smooth out such fluctuations by stimulating aggregate demand when the economy is depressed and reducing aggregate demand when the economy is over-heating. Ideally, the government would wish to manage aggregate demand so that it grows exactly in line with the underlying growth of potential GNP, the dashed line in Fig. 41, exactly offsetting the amplitude of troughs and peaks of the business cycle.
Two main problems exist, however:
(a) the establishment of the correct timing of such an INJECTION or WITHDRAWAL;
(b) the establishment of the correct magnitude of an injection or withdrawal into the economy (to counter depressions and booms). With perfect timing and magnitude, the economy would follow the trend line of potential GNP.
A number of stages are involved in applying a stabilization policy as shown in the figure. For example, at time period zero the onset of a recession/depression would be reflected in a downturn in economic activity, although delays in the collection of economic statistics means that it is often time period 1 before data becomes available about unemployment rates, etc. Once sufficient data is to hand, the authorities are able to diagnose the nature of the problem (time period 2) and to plan appropriate intervention, such as tax cuts or increases in government expenditure (time period 3). At time period 4, the agreed measures are then implemented, although it may take some time before these measures have an effect on CONSUMPTION, INVESTMENT, IMPORTS, etc. (see MULTIPLIER). If the timing of these activities is incorrect, then the authorities may find that they have stimulated the economy at a time when it was already beginning to recover from recession/depression, so that their actions have served to exacerbate the original fluctuation (dotted line 1 in Fig. 41). The authorities could also exacerbate the fluctuation (dotted line 1) if they get the magnitudes wrong by injecting too much purchasing power into the economy,