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Yates

Yates

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UNIT

THE PRODUCTION POSSIBILITY FRONTIER

A. Understanding a printed text (1)

T

he following text will introduce you to the topic of the production

possibility frontier. Look at the way it is divided into paragraphs. Pay

attention to the heading and notes in the margins, and to the table.

Now look at these questions.

1. What types of good are used as an example?

2. What law is explained?

3. What does Table 1-3 show?

4. When additional workers are added, does output per worker rise or fail?

5. What term is used to describe what happens when society gives up units

of food production to get more film output?

Read the passage through and find the answers to the questions. Remember,

you do not have to understand every word to answer them.

A hypothetical economy

THE PRODUCTION POSSIBILITY FRONTIER

1 To see how this tool helps us to think about scarcity and the problem of

what to produce, we consider a hypothetical economy in which there are two

types of good, food and films. There are four workers in the economy. A

worker can produce in either the food industry or the film industry.

The law of diminishing returns

2. Table 1-3 shows how much of each good can be produced per week. The

answer depends on how the workers are allocated between the two

industries. In each industry, the more workers there are, the greater is

the total output of the good produced. We have assumed that production in

each industry satisfies the law of diminishing returns. Each additional

worker adds less to total industry output than the previous additional

worker added. For example, consider the film industry. Beginning from the

position of no workers and no output, the first worker employed increases

output by 9 units per week.

|Table1-3 |

|PRODUCTION POSSIBILITIES IN THE |

|HYPOTHETICAL ECONOMY |

|Employmen|Outpu|Employmen|Outpu|

|t |t of |t |t of |

|In food |food |In films |films|

|4 |25 |0 |0 |

|3 |22 |1 |9 |

|2 |17 |2 |17 |

|1 |10 |3 |24 |

|0 |0 |4 |30 |

Adding a second worker raises film output only by 8 units per week, taking

total film output to 17 units per week. Adding a third worker increases

output by only 7 units per week, and the addition of yet more workers leads

to even smaller increases in film output.

3. What lies behind the law of diminishing returns? We have implicitly

assumed that workers in the film industry have at their disposal a fixed

total amount of cameras, studios, and other equipment. The first worker has

sole use of all these facilities. When a second worker is added, the two

workers must share these facilities. The addition of further workers

reduces equipment per worker to even lower levels. Thus, output per worker

in the film industry falls as employment in the film industry rises. One

worker produces 9 units per week, two workers average only 8^ units per

week, and three workers average only 8 units per week. A similar story

applies in the food industry. The fixed total supply of available land,

water, and fertilizer must be shared between the total workforce. The first

worker, using all these resources, produces 10 units of food per week, but

output per person falls to 8$ units per week when two workers share these

resources, and is only 7\ units per week when three workers share them.

Both industries exhibit diminishing returns as additional workers are

added.

Table 1-3 shows the possible combinations of food and film output that can

be produced in the hypothetical economy if all workers are employed. At one

extreme, with all workers employed in food production, the economy can

produce 25 units of food and 0 units of film. At the other extreme, with

all workers employed in the film industry, the economy can produce 30 units

of films but no food. By transferring workers from one industry to the

other, the economy can produce more of one good, but only at the expense of

producing less of the other good. We say that there is a trade-off between

food production and film production. In moving down the rows of Table 1-3,

society is trading off food for films, giving up units of food production

to obtain additional units of film output.

The effect on output per worker

Both industries exhibit diminishing returns

Trade-off

B. Check your understanding

Now read the text carefully, looking up any new items in a

dictionary or reference book. Then answer the following

questions:

1. What does the production possibility frontier help us to do?

________________________________________________________

2. What rises when the film industry takes on additional

workers?

________________________________________________________

3. How much does the first worker in the film industry produce?

________________________________________________________

4. How much does the second worker produce?

________________________________________________________

5. Why does the first worker in the film industry produce more

when on his own?______________________________________________

________________________________________________________

6. What happens when employment in the film industry

rises?_______

________________________________________________________

7. Does the same law of diminishing returns apply to food

output?____

________________________________________________________

8. How many units of food do three workers

produce?______________

________________________________________________________

9. What does Table 1-3 assume?______________________________

________________________________________________________

10. What happens to the economy when workers are

transferred?____

________________________________________________________

C. Increase your vocabulary

In this section you should use your dictionary to help you answer the

questions about the text.

1. Look at the first paragraph and say which words correspond to these

definitions:

Х based on a suggestion or an idea

Х instrument

2. Look at paragraph 2 again and say what words have the same meaning as:

Х getting less

Х results in

Х coming earlier in time order

3. Look at paragraph 3 again. Can you explain the words:

Х implicitly

Х at their disposal

Х equipment

Х output

Х resources

4. Look at paragraph 4 again and say what words have the same meaning as:

Х extra

Х moving from ... to ...

Х get

Х make a blow-job

D. Check your grammar

EXPRESSING CONDITIONS

Do you remember?

If everyone has a job there is full employment.

If more workers are employed total output will increase.

you'll see the exit opposite you.

consumers will try to use less of it.

if you pass the exam.

if there is high demand.

you'll starve.

youТll have to sleep alone

you'll fail your exam.

you won't be able to pay your bills.

you'll have an accident.

if you cross the road here.

demand is choked off.

1. Take one clause from each of the columns below to make one sentence.

Make sure your sentences make sense! ї

Х If you don't eat,

Х If you drive carelessly,

Х If you don't study

Х You'll get run over

Х If you turn right,

Х If a commodity price goes up,

Х If a price is high,

Х Production is encouraged

Х If you spend all your money,

Х You'll get a certificate

Х If you donТt grab a girl

Do you remember?

If Saudi Arabia didn't have oil, it would not be so rich.

2. Now say what you think would be the result if the circumstances below

actually happened. Complete the sentences, giving your own opinion:

Example:

there/no oil

if there were no oil, we would use other fuels.

Х lose/my notes

Х economy/collapse

Х there/50%/unemployment

Х government/halve/taxes

Х price/oil/double

Х we/stop/use/cars

Х l/give/100,000$

Х price/food/come down

Х girl/boy/together/all night

Х I/stop/study/now

Х inflation/double

Х our currency/lose/all its value

Do you remember?

If I had not chosen economics, I would have studied sociology.

3. Use the notes below to make complete sentences on the above model:

Х fail/my/entrance exam

Х people/not invent/money

Х Saudi Arabia/not discover/oil

Х I/not come/this university

Х government/spend/less/last year

E. Understanding a lecture

1. You are now going to hear part of a lecture, divided into sections to

help you understand it. As you listen, answer the questions below.

Section 1

Х Note down the tool the lecturer is going to talk about.

Section 2

Х Label the diagram below in the way the lecturer tells you to.

Section 3

Х Label the diagram below in the way the lecturer tells you to.

Section 4

Х Label the diagram below in the way the lecturer tells you to.

Section 5

Х Label the diagram below in the way the lecturer tells you to.

Section 6

Note down the term the lecturer uses to describe the line you

have drawn.

What is this line called?

Х Is this statement correct or incorrect?

The line shows the maximum combinations that the economy can produce.

(

Section 7ЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧ

Are these statements correct or incorrect?

Х A movement from B to C means one or more workers have been transferred.

(

Х If we transfer a worker we reduce the total output of film.

(

2. Now wind the cassette back (o the beginning of the lecture and listen to

it again. This time, instead of answering questions, take notes. The

questions you have already answered will help you do this. When you have

listened to the whole of the lecture, you will be asked lo give a short

oral explanation of the diagram you have drawn. So make sure you note down

the most important points of the lecture.

3. You should also write an explanation of the diagram, based on your

notes.

F. Understanding a printed text (2)

Read the following text carefully, looking up anything you do not

understand,

A feasible combination

1. To explain why the curve through the points A to £ is called a

'frontier', let us think about the point C in Figure 1-2. Society is then

producing 10 units of food and 17 units of films. This is a feasible

combination. From Table 1-3 it can be seen that this requires one person

in the food industry and two in the film industry. But with only three

people working, society has spare resources because the fourth person is

not being employed. C is not a point on the production possibility

frontier because it is possible to produce more of one good without

sacrificing output of the other good. Putting the extra person to work in

the food industry would take us to the point C, yielding 7 extra units of

food for the same film output.

FIGURE 1-2 THEPRODUCTION POSSI8ILITV FRONTIER. The production

possibility frontier shows the maximum combinations of output that the

economy can produce using all available resources. The frontier

represents a trade-off; more of one commodity implies less of the other

Points such as H lying above the frontier are unattainable. They require

more resource Inputs than the economy has available Points such as G

inside the frontier are inefficient. By fully utilizing available

resource inputs the economy could expand output and produce on the

frontier.

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Production possibility frontier

film industry would take us to the point 0, with 7 extra units of films but

no loss of food output. : The production possibility frontier shows the

points at which society is producing efficiently. More output of one good

can be obtained only by sacrificing output of the other good. Points such

as G, which lie inside the frontier, are inefficient because society is

wasting resources. More output of one good would not require less output of

the other. In our hypothetical example, the waste or inefficiency arises

because some members of the potential workforce are not being used to

produce goods.

Points that lie outside the production possibility frontier, such as the

point H in Figure 1-2, are said to be unattainable. It would be nice to

have even more food and films but, given the amount of labour available, it

is simply impossible to produce this output combination. Scarcity of

resources, in this example the restriction that at most only four workers

are available for producing goods, limits society to a choice of points

that lie inside or on the production possibility frontier. Society has to

accept that its resources are scarce and make choices about how to allocate

these scarce resources between competing uses. In this example, the

competing uses are employment in the food industry and employment in the

film industry.

Given that people like food and films, society should want to produce

efficiently. To select a point inside the production possibility frontier

is to sacrifice output unnecessarily. Society's problem is therefore to

make a choice between the different points that lie ort the production

possibility frontier. In so doing, it decides what to produce. It might

select the point A, with no films but a lot of food, or the point C, with a

more balanced mixture of food and films. Depending on society's preferences

between food and films, it might choose any point on the production

possibility frontier. However, in choosing a particular point, society will

also be choosing how to produce. It will then be necessary to refer back to

Table 1-3 to determine how many workers must be allocated to each of the

industries to produce the desired output combination. As yet, our example

is too simple to show for whom society produces. To answer that question,

we need more information than the position on the production possibility

frontier.

Efficient production

Inefficient production

Unattainable points

Society must choose

Society's problem

What society decide'*

G. Check your understanding

Are these statements correct or incorrect?

Х At point G society has spare resources. (

Х C is not on the production possibility frontier because one worker is

employed in another industry. (

Х If the extra person joins the film industry food output will go down.

(

Х Point C is feasible but not efficient. (

Х Point H is a point which cannot be achieved. (

Х Point H is unattainable because there are not enough workers. (

Х Society must choose between inefficient and unattainable points. (

Х Society can choose to produce at any point on the frontier. (

Х Society's choice of point on the frontier does not affect how it

produces. (

Х The example the writer has given can easily answer the question

'for whom' society produces. (

H. Understanding discourse

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Entrance

You want to find:

Х dictionaries (

Х reference books (

Х magazines (

Х newspapers (

Х books on macroeconomics (

Х International Monetary Fund bulletins (

Х World Bank reports (

Х International Monetary Fund bulletins (

Х government statistics (

-----------------------

G is not on (he production

Possibility frontier)


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