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,Study Unit 1
What Economics is all about
Economics is a social science that studies how people use scarce resources to satisfy their
unlimited wants. Microeconomics looks at this at an individual, household or firm level while
Macroeconomics is a broader look which is an aggregate of all the individuals, households and
firms in a given economy. The main aspects in Microeconomic theory are supply, demand,
scarcity, choices and opportunity cost.
The Economic Problem
Every individual has a set of needs and wants that they seek to satisfy. Some are important for
day-to-day living, such as food, water, clothing, shelter and health care. In Economics these are
termed needs. Some of the things that the human being wishes to accumulate are not really
necessary for a living. He/she can do without. Examples include sports cars, jewellery, fancy
clothing and luxurious accommodation. These are termed wants. Our needs and want are
never ending, yet the means to satisfy them are limited in supply. Hence the economic problem,
“how to satisfy these never ending wants and needs, given limited resources”. This is the basis
of Economics.
Scarcity
Almost every resource on this planet comes in limited supply. Money, housing, time, food,
labour, machinery, cars all come in limited quantities such that we can`t all get everything that
we need to satisfy our needs and wants. This limit in supply and availability brings another
important principle in Economics, that of scarcity.
, Opportunity Cost and Choice
Opportunity cost is one of the very important concepts in Economic theory. It`s very important to
note that opportunity cost depends on individuals as people value alternatives differently.
Opportunity cost is the value of the next (second) best alternative forgone or sacrificed when a
certain choice is made. The existence of scarcity brings up the concept of opportunity cost when
a choice is made. Because our wants and needs are unlimited/endless, and the resources to
satisfy them are limited, this leaves us with no option but to make choices between competing
alternatives. For example, consider money, a resource which is available in very limited supply,
yet used to satisfy an endless list of unlimited needs and wants. If let’s say you have R1 000 for
use and you choose to use R500 on airtime, it automatically leaves you with R500 for use on
other competing needs. When determining opportunity cost of any choice made it is very
important to rank your alternatives in order of preference, from the most preferred to the least
preferred. Take Tebogo for example. On a Saturday morning he has the following options that
he ranked in order of preference:
1) Work
2) Study
3) Do Laundry
4) Chat
5) Watch Soccer
6) Do Shopping
7) Sleep
Based on the above, Tebogo`s opportunity cost of Work will be Studying. His opportunity cost of
Studying will be Laundry, and that of Laundry will be Chatting. The opportunity cost of Chatting
will be the Soccer forgone. Note that every time the opportunity cost will be the value of the next
best alternative forgone, not the values of all the alternatives forgone.
The Economic Problem
All authorised decision makers are faced with the questions to do with what to produce amongst
the (limited) competing goods and services that satisfy unlimited needs and wants. Should we
erect more hospitals or build more schools, use the land to construct factories for production of
cars and computers or instead use that land for farming to produce maize, wheat and milk?
After the what question has been answered, the how to produce question has to be addressed.
Should we employ more labour or more capital? Now that we have decided to use that land for
farming, how should we produce that maize, wheat and milk? After we have answered that, we
have one more question to answer, for whom to produce? Should we produce the maize,
wheat and milk according to the people`s needs. Say a family of 4 gets 100kg of maize, 50kg
wheat and 20 litres of milk per month while a family of 6 gets 150kg of maize, 70kg wheat and
8litres of milk or should we produce only for those who can afford?
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