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What is Economics
Since resources are finite, goods and supplies are also finite. Human needs and wants are infinite. Thus, there is a conflict between infinite wants and needs and finite resources. There must be a system for rationing the scarce resources. Economics is the study of how scarce resources are allocated to fulfill the infinite wants of consumers.
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Everything is
relatively scarce
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Opportunity cost is
- what you give up in order to have sth else.
- If there is a choice, there is an opportunity cost. If a good or service has an opportunity cost, it is relatively scarce. If a product is relatively scarce, it is an economic good.
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The Basic Economic Problem
What should be produced and it what quantities?
How should things be produced?
Who should things be produced for? (for people who can afford them or “fairly”)
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Factors of Production
Land
Labor
Capital (physical capital, factories etc., and human capital, value of the work can be improved through investments in education, health care)
Entrepreneurship (management and risk taking factor of production)
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PPC and PPF
Shows the maximum combination of goods and services that can be produced by an economy at any given time period if all the resources are being used efficiently and everything else is fixed.
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The PPC is a curve bc
not all factors of production are equally good at producing both products.( Opportunity cost increases as we move closer to the axis.)
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An outward shift of the PPC can only be achieved if
there is an improvement in the quantity and or quality of the factors of production. If the shift happens it means there was a change in potential output but not actual output.
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The PPC might shift in bc of
war or natural disasters.
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Free Market Economy:
What is it
A self-righting system in which prices are used to ration goods and services. All production is in private hands and demand and supply are left free to set wages and prices in the economy.
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Free market Economy disadvantages
Demerit good will be overprovided
Merit goods will be underprovided
Harmful for the environment
Some members of the society will not be able to kook after themselves
Large firms may dominate
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Centrally Planned Economy
What is it?
The basic economic problem is addressed by the government. Government bodies arrange all production, set wages and set prices.
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Centrally planned economy
Disadvantages:
Planning is too difficult
Resources will not be used efficiently
Incentives tend to be distorted
There is a loss of personal choice and freedom
Governments might make decisions that are not popular or even corrupt
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Economic Growth
National income is the value of all goods and services produced in a set amount of time
If the national income per capita has increased, we can say that there has been economic growth.
We can’t really say much about the life quality based on economic growth.
We just look at GDP or GNI
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Economic Development
Is a measure of welfare.
- Is calculated using HDI
- which takes real GNI per capita
- expected years of schooling and mean years of schooling
- life expectancy at birth
- into account
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Sustainable Development
Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
It is becoming increasingly vital to appreciate the negative consequences of economic growth.
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Market:
A mechanism that determines which goods and services will be produced in an economy and how scarce resources will be allocated.
Product markets (goods and services)
Labor markets (factors of production)
Financial exchange markets (foreign exchange, stock)
Informal markets (black markets)
Emerging markets (in developing countries)
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Demand:
The quantity of a good and service that consumers are willing and able to purchase at a given period.
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Law of Demand:
Income effect
When the price of a product falls, consumers have more income left to spend.
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Substitution Effect:
- Law of Demand
- When the price of a product falls, it becomes more attractive.
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Veblen Goods:
Have snob value
Looks like a C on the graph.
The demand is normal until snob value status and the quantity demanded increases as the price increases afterwards.
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Normal Goods:
As income increases, the demand curve shifts out.
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Inferior Goods:
As income rises, the demand curve shifts in.
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Substitutes:
If the price for one of the goods increases, the demand curve for the other shifts out.
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Complements:
If the price for one of the goods increases, the demand curve shifts in.
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Supply:
: is the willingness and ability of producers to produce a quantity of a good or service at a given price in a given time period.
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The law of supply:
States that the quantity supplied will increase as the price rises.
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The cost of factors of production:
If the cost of the factors of production increase, the supply curve will shift in.
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The price of other products:
If they increase for one product, the supply curve will shift in for another product.
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non price determinants of supply:
The state of the technology
Expectations
Government intervention (indirect taxes, subsidies)
Weather
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Market equilibrium is when
quantity demanded = quantity supplied
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If the market price is higher than the equilibrium
excess supply occurs
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If the market price is lower than the equilibrium
excess demand occurs
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Consumer Surplus:
Is the extra satisfaction gained by consumers from paying a price lower than what they were prepared to pay.
The left, upper part of the supply demand X
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Producer Surplus:
Is defined as the excess of actual earnings that a producer makes from a given quantity of output, over and above the amount the producer would be willing to accept for that output
The left, down part of the supply demand X
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Allocative Efficiency
When a market is at equilibrium without any external influences and external effects, it is said to be socially efficient or in a state of allocative efficiency. Perhaps producers would like higher prices and consumers would like to pay lower prices but through this, community surplus is maximized.
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Community surplus =
producer surplus + consumer surplus
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Free market properties
Free markets supply the goods to the consumers who want them the must
Free markets allocate the demand for goods to the sellers who can produce them at the lowest price
Free markets produce the quantities of goods that maximize the sum of consumer and producer surplus
Free markets lead to allocative efficiency
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Marginal Social Cost Curve
Is the extra cost incurred by society from the production of an extra unit of good
When we assume that the costs of the industry are equal to the costs to society, the supply curve represents MSC
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Marginal Social Benefit Curve
Is the extra benefit enjoyed by the society from the consumption of an extra unit of good
When the benefits in the market are equal to the benefits to society, the demand curve represents MSB
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Elastic demand:
more horizontal
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Inelastic Demand:
more vertical
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Price works as an incentive and a signal
Signals that you need to change sth
Plays the role of an incentive
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What would happen to the supply of white bread if a firm were to find out that there has been a large increase in the demand for brown bread, which they could also produce?
Would shift to the left. The quantity supplied of the brown bread would increase. Movement along brown bread, shift of white bread.
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Higher priced products have a more elastic demand, as the consumers are more concerned when the price of an expensive product rises.
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The supply curve normally curves ....
The demand curve normally curves ..
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Negative: XED
Complements
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XED
Percentage change in quantity demanded of product X/ percentage change in price of product Y
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PED
PED: Percentage change of demand/ percentage change of price
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What is PED
How much the quantity demanded of a product changes when there is a change in its price
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What is XED
Cross elasticity of demand
Measures how much a quantity demanded of a product changes when there is a change in the price of another product
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When Demand curve is horizontal =
- PED is infinite
- perfectly elastic
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When demand curve is vertical
- perfectly inelastic demand
- PED= 0
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decisions
0<PED<1
1<PED
PED = 1
- should raise the price
- should not raise the price
- no difference
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Number and closeness of substitutes =
Time period considered =
How broadly the product is defined =
- positive
- positive
- negative
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Demand for habit forming goods is
less elastic
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Demand for necessities is
less elastic
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