Demand and Supply

Конспект урока

Педагогика и дидактика

As consumer income is increased, demand for a normal good will also increase but demand for an inferior good will decrease. A normal good is a good for which demand increases when incomes rise. An inferior good is a good for which demand falls when incomes rise.



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Demand and Supply

Demand is the quantity of a good that buyers wish to buy at each price1. Other things equal2, at low prices the demanded quantity is higher.

Supply is the quantity of a good that sellers wish to sell at each price. Other things equal, when prices are high, the supplied quantity is high as well.

The market is in equilibrium when the price regulates the quantity supplied by producers and the quantity demanded by consumers. When prices are not so high as the equilibrium price, there is excess demand (shortage) raising the price. At prices above the equilibrium price, there is excess supply (surplus) reducing the price.

There are some factors influencing demand for a good, such as the prices of other goods, consumer incomes and some others.

An increase in the price of a substitute good (or a decrease in the price of a complement good) will at the same time raise the demanded quantity.

As consumer income is increased, demand for a normal good will also increase but demand for an inferior good will decrease. A normal good is a good for which demand increases when incomes rise. An inferior good is a good for which demand falls when incomes rise.

As to supply, some factors are assumed3 as constant. Among them are technology, the input price, as well as degree of government regulation. An improvement in technology is as important for increasing the supplied quantity of a good as a reduction in input prices.

Government regulates demand and supply, imposing ceiling prices (maximum prices) and floor prices (minimum prices) and adding its own demand to the demand of the private sector.

Пояснения к тексту

  1.  each price зд. любая цена
  2.  other things equal — при прочих равных условиях
  3.  are assumed — рассматриваются, принимаются

Аудиторная работа № 1

1. Определите по суффиксам, к каким частям речи относятся следующие слова:

information, development, situation, growth, productive, productivity, investment, important, agriculture, importance, health, agricultural, industrial, wealth, worker, active, activity

2. Выберите из приведенных ниже слов пары однокоренных глаголов и существительных и переведите их на русский язык.

to fall, consumer, to stabilize, organization, demand, to sell, buyer, influence, to invest, to improve, consumption, fall, improvement, stabilization, to intervene, to organize, investment, seller, to consume, to buy, to demand, increase, to reduce, reduction, to influence, to increase, intervention

3. Переведите следующие предложения на русский язык, обращая внимание на  причастные обороты:

  1.  In East-European countries consumers couldn't get goods, and factories couldn't buy inputs at prices held low by governments.
  2.  Governments intervene in economies controlling the supply of money, limiting monopolies and helping private industries.
  3.  An improvement in technology will increase the supply of a good, increasing the quantity supplied at each possible price.
  4.  Governments regulate economic activities imposing some restrictions.
  5.  The governments can influence for whom goods are produced, taking income away from some people and giving it to others.
  6.  The high price for a good is the market mechanism telling suppliers it is now time to increase production.

7.  The developing countries hope that the industrial    countries will raise imports from the less developed countries imposing tariffs on imports from other industrial countries.

8. Income is money of all kinds coming in regularly to a person, family or organization.

9. Active money is money going from man to man and used by the people in buying and selling goods and services.

  1.   Reducing our imports, we decrease the exports of others.
  2.   At prices above equilibrium we have a situation known as excess supply, or surplus.

4. Выберите подходящее по смыслу слово из предлагаемых в скобках вариантов.

  1.  The fashion for miniskirt (increased / reduced) the demand for textile materials.
  2.  Even in (some/the same) middle-income countries many people are very poor.
  3.  Government regulations sometimes (decrease/ impose) a change in (technology/quantity) that producers do not want to use.
  4.  Stabilization of prices is of great importance to industrial nations (as well as/as well) the Third World countries.

Freeing up (освобождение) prices leads to their (decrease/ increase).

  1.  (Inferior/Normal) goods are usually low-quality goods for which there are higher-quality (improvements/substitutes) sold at higher prices.
  2.  A decrease in (complement/ input) prices makes the production less expensive.

5. Закончите предложения, использовав сравнительные конструкции со словами  than или as.

  1.  The market is in equilibrium when the demanded quantity is as large ...
  2.  Prices rise when they are not so high ...
  3.  Prices rise when they are lower ...
  4.  We may have excess supply if prices are higher ...
  5.  The demand for inferior goods at high incomes will not be as high ...

6. а) Ответьте на вопросы к тексту Demand and Supply.

  1.  What is demand?
  2.  What is supply?
  3.  When are the demanded and supplied quantities of goods high?
  4.  How are prices and the supplied and demanded quantities regulated by the market?
  5.  Which factors influence demand? How do they work?
  6.  Which factors influence supply?
  7.  How can governments regulate demand and supply?

б) Подумайте и скажите:

  1.  How can prices for other goods influence the demand for a good? Supply examples.
  2.  What inferior goods can you name?
  3.  What may be the result of imposing ceiling prices?

7. Переведите следующие предложения на русский язык, обращая внимание на
some и the same.

At some price, which we call the "equilibrium price", the demanded quantity of a good equals the supplied quantity.

All markets have the same economic function: they form prices equalling the quantities of goods that people wish to buy or to sell.

There has been some rise of income in the past two decades (десятилетия) in developing countries.

A less developed country is the same as a country of the Third World.

  1.  An association is an organization formed by the people having the same interests and held together by a system of management.
  2.  For the next twenty years the supply of energy will be limited in some sectors of the US economy.
  3.  A consumer group is a small group of people living in the same place who study the prices and the quality of consumer goods sold in shops, and make the information known to the public.
  4.  An improvement in technology is something that makes it possible for firms to produce more goods with the same quantity of inputs as before.


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