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13 Elasticity of supply and demand
People very seldom have everything they want. Usually we have to decide carefully how we spend out income. When we exercise our choice, we do so according to our personal scale of preferences. In this scale of preferences essential commodities come first (food, clothing, shelter, medical expenses etc.), then the kind of luxuries which help us to be comfortable (telephone, special furniture, insurance etc.), and finally those non-essentials which give us personal pleasure (holidays, parties, visits to theatres or concerts, chocolates etc.). They may all seem important but their true importance can be measured by deciding which we are prepared to live without. Our decisions indicate our scale of preferences and therefore our priorities.
Elasticity of demand is a measure of the change in the quantity of a good, in response to demand. The change in demand results from a change in price. Demand is inelastic when a good is regarded as a basic necessity, but particularly elastic for non-essential commodities. Accordingly, we buy basic necessities even if the prices rise steeply, but we buy other things only when they are relatively cheap.
Vocabularyelasticity – еластичність
to be related to – стосуватись
willingness – готовність
a means of exchange – засіб обміну
to spend out income –витрачати доход
to exercise one’s choice – здійснювати вибір
scale of preferences – шкала переваг
personal pleasure – особиста насолода
priority – пріоритет
in response to – у відповідь на
to regard – вважати
accordingly – таким чином
to rise steeply – круто зростати
relatively cheap – відносно дешеві .
I. Complete the sentences using the text:1. Economists define “demand” as a … .
2. Money has no value in itself, but … .
3. We spend out income according to our … .
4. Elasticity of demand is … .
5. Demand is inelastic when … .
6. We buy basic necessities even if … .
II. Answer the questions, basing your answers on the text:1. What is elasticity of supply response to?
What is the definition of demand?
How is demand indicated?
What is money?
What do we do when we exercise our choice?
What comes second in our scale of preferences?
What is our third priority?
What is elasticity of demand?
When is demand inelastic? III. Say whether these statements are true or false and if they are false, say why.
1. When people offer money for particular goods, they indicate that a demand exists.
2. Money is usually valuable in itself.
3. People do not usually have everything they want.
4. Basic needs come before luxuries.
5. Our decisions on how to use our money show what we need most and what we are willing to do without.
6. Demand for essential commodities is always elastic.
Книга: Англійська для економістів - Гаращенко
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