to export demand. Whether or not a devaluation ‘works’ in achieving balance of payments equilibrium, however, depends on a number of factors, including: the sensitivity of import and export demand to price changes, the availability of resources to expand export volumes and replace imports and, critically over the long term, the control of inflation to ensure that domestic price rises are kept in line with or below other countries’ inflation rates. (See DEPRECIATION 1 for further discussion of these matters.) Devaluations can affect the business climate in a number of ways but in particular provide firms with an opportunity to expand sales and boost profitability. A devaluation increases import prices, making imports less competitive against domestic products, encouraging domestic buyers to switch to locally produced substitutes. Likewise, a fall in export prices is likely to cause overseas customers to increase their demand for the country’s exported products in preference to locally produced items and the exports of other overseas producers. If the pound, as in our example above, is devalued by one-third, then this would allow British exporters to reduce their prices by a similar amount, thus increasing their price competitiveness in the American market. Alternatively, they may choose not to reduce their prices by the full amount of the devaluation in order to increase unit profit margins and provide additional funds for advertising and sales promotion, etc. Compare REVALUATION. See INTERNAL-EXTERNAL BALANCE MODEL.
developed country an economically advanced country the economy of which is characterized by large industrial and service sectors, high levels of gross national product and INCOME PER HEAD. See Fig. 51. See STRUCTURE OF INDUSTRY, DEVELOPING COUNTRY, ECONOMIC DEVELOPMENT.
developing country or less developed country or underdeveloped country or emerging country or Third World country a country characterized by low levels of GROSS NATIONAL PRODUCT and INCOME PER HEAD. See Fig. 51. Such countries are typically dominated by a large PRIMARY SECTOR thatproduces a limited range of agricultural and mineral products and in which the majority of the POPULATION exists at or near subsistence levels, producing barely enough for their immediate needs, thus being unable to release the resources required to support a large urbanized industrial population. The term ‘developing’ indicates that, as seen by most such countries, the way to improve their economic fortunes is to diversify the industrial base of the economy by, in particular, establishing new manufacturing industries and by adopting the PRICE SYSTEM. To facilitate an increase in urban population necessary for INDUSTRIALIZATION, a nation may either IMPORT the necessary commodities from abroad with the FOREIGN EXCHANGE earned from the EXPORT of the (predominantly) primary goods, or it can attempt to improve its own agriculture. With appropriate ECONOMIC AID from industrialized countries and the ability and willingness on the part of a developing country, the transition into a NEWLY INDUSTRIALIZED COUNTRY could be made.
Certain problems do exist, however. For instance, increases in real income that are achieved need to be maintained, which means keeping population numbers in check. Illiteracy and social customs for large families tend to work against governmental efforts to increase the STANDARD OF LIVING of its citizens. Also, most of the foreign exchange earned by such countries is by exporting, mainly commodities (see INTERNATIONAL TRADE). See ECONOMIC DEVELOPMENT, STRUCTURE OF INDUSTRY, DEMOGRAPHIC TRANSITION, POPULATION TRAP, INTERNATIONAL COMMODITY AGREEMENTS, UNITED NATIONS CONFERENCE ON TRADE AND DEVELOPMENT, INTERNATIONAL DEBT.
development area an area of the country formerly designated under UK REGIONAL POLICY (for example, the Northeast and South Wales) as qualifying for financial and other assistance in order to promote industrial regeneration. Development Areas reconfigured (in 2002) as ‘Tier 1 ASSISTED AREAS’ under a joint UK/EUROPEAN UNION regional policy programme. Development/Tier 1 areas are characterized by UNEMPLOYMENT rates that are significantly higher, and levels of INCOME PER HEAD that are significantly lower, than the national average. To remedy this situation, the usual practice is to encourage the establishment of new firms, the expansion of existing firms and the establishment of new industries by offering a variety of investment incentives: investment grants and allowances, tax write-offs, rent- and rate-free (or reduced) factories, etc.
In the UK, firms investing in the assisted areas are offered REGIONAL SELECTIVE ASSISTANCE, which is given on a discretionary basis to cover capital and training costs for projects that meet specified job-creation criteria.
development economics the branch of economics that seeks to explain the processes by which a DEVELOPING COUNTRY increases in productive capacity, both agricultural and industrial, in order to achieve sustained ECONOMIC GROWTH.
Much work in development economics has focused on the way in which such growth can be achieved, for instance, the question of whether agriculture ought to be developed in tandem with industry, or whether leading industries should be allowed to move forward independently, so encouraging all other sectors of society. Another controversial question is whether less developed countries are utilizing the most appropriate technology. Many economists argue for intermediate technology as most appropriate rather than very modern plants initially requiring Western technologists and managers to run them. Socio-cultural factors are also influential in attempting to achieve take-off into sustained economic growth. See ECONOMIC DEVELOPMENT, INFANT INDUSTRY.
differentiated product see PRODUCT DIFFERENTIATION.
differentiation competition strategy see COMPETITIVE STRATEGY.
diffusion the process whereby INNOVATIONS are accepted and used by firms and consumers through imitation, licensing agreements or sale of products and patents.
diminishing average returns see DIMINISHING RETURNS.
diminishing marginal rate of substitution see MARGINAL RATE OF SUBSTITUTION.
diminishing marginal returns see DIMINISHING RETURNS.
diminishing marginal utility a principle that states that as an individual consumes a greater quantity of a product in a particular time period, the extra satisfaction (UTILITY) derived from each additional unit will progressively fall as the individual becomes satiated with the product. See Fig. 45.
The principle of diminishing MARGINAL UTILITY can be used to explain why DEMAND CURVES for most products are downward sloping, since if individuals derive less satisfaction from successive units of the product they will only be prepared to pay a lower price for each unit.
Demand analysis can be conducted only in terms of diminishing marginal utility if CARDINAL UTILITY measurement is possible. In practice, it is not possible to measure utility precisely in this way, so demand curves are now generally constructed from INDIFFERENCE CURVES, which are based upon ORDINAL UTILITY. See CONSUMER EQUILIBRIUM, REVEALED PREFERENCE.
diminishing returns the law in the SHORT-RUN theory of supply of diminishing marginal returns or variable factor proportions that states that as equal quantities of one VARIABLE FACTOR INPUT are added into the production function (the quantities of all other factor inputs remaining fixed), a point will be reached beyond which the resulting addition to output (that is, the MARGINAL PHYSICAL PRODUCT of the variable input) will begin to decrease, as shown in Fig. 46.
As the marginal physical product declines, this will eventually cause AVERAGE PHYSICAL PRODUCT to decline as well (diminishing average returns). The marginal physical product changes because additional units of the variable factor input do not add equally readily to units of the fixed factor input.
Fig. 45 Diminishing marginal utility. To a hungry man the utility of the first slice of bread consumed will be high (O2) but as his appetite becomes satiated, successive
