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Is worth the same amount in terms of the other factor whichever product it is used in. Otherwise,

factors could be swapped between products and extra output gained. Second, that the marginal

rate of substitution must be equal for both consumers; otherwise, the consumers could swap

commodities to their mutual benefit. Third, allocative efficiency requires that the marginal rate of

transformation must equal the marginal rate of substitution: if consumers feel one banana is worth

two apples, and producers can make one extra banana at the sacrifice of only one apple, it will pay

society for them to produce one apple less and one extra banana, and to go on making that switch,

until eventually consumers tire of bananas and value apples more highly than they did; and land

suitable for banana production will be so marginal that for every bit of land removed from apples,

hardly any bananas will be produced. At this stage, the two rates of substitution will be equal.

Economic efficiency on these criteria will exist in an economy in which perfect competition

characterizes every sector.

Commentary and Notes to Text 15.7.1.3

1. Productive efficiency — производительная эффективность

2. allocative efficiency — эффективность, связанная с распределением ресурсов

3. distributional efficiency — эффективность, связанная с распределением продукции

4. the rate of technical substitution — показатель технического замещения

5. the marginal rate of substitution — предельный показатель замещения

6. to go on making that switch — продолжать делать то же самое

15.7.1.4. Read the text “Market Power” and explain how the market power mechanism acts.

Market Power

While examining the market situation we have considered the demand and supply relation, or

the market equilibrium which is established under the market power.

Market power is the degree to which a firm exercises influence over the price and output in a

particular market. Under perfect competition, all firms are assumed to have zero market power: they

have to take the going price, and cannot hope to alter it on their own. Wherever firms represent a

non-negligible portion of the whole market, however, instead of facing a flat demand curve, they wil

face a downward-sloping one. This means that, in contrast to the perfect competitor, if they raise

their price, they do not lose all their sales. It also means, however, that if they wish to increase their

sales, they have to lower their price. The stronger this relationship, the greater the market power

Where market power exists, the producer has such influence on the market that the amount he decides

to produce affects the market price, and so price is not equivalent to marginal revenue. Market

power is related to the availability of substitute items. Those items which are highly differentiated

from those of competitors will give more market power to the producer than those which are standard.

Commentary and Notes to Text 15.7.1.4

1. Market power — рыночные силы

2. The going price — существующая (действующая) цена