1.1 Nature Of Economics Flashcards
Developing models (why economist make them)
They develop models to explain how the economy works, e.g. theories of supply and demand or the circular flow of income. These are developed by putting forwards a model, gathering evidence and then accepting, changing or disregarding the model.
What are theories
They can often be expressed in words
What are models
Expressed in mathematical terms
Why are assumptions made
When there are too many variables which can change within an economic model
What is ceteris Paribus
All other thing remain equal
How is econ a social science
It is difficult to set up experiments to test hypothesis. As economists has to gather data in the every day world other variables are always changing. However, it is still a science as it is all linked by the method of building a model or theory
Argument for why econ isn’t a science
It studies human behaviour which cannot be reduced to scientific law. However, groups of people are much more predictable than individuals themselves
What is a positive statement
A statement which is objective and made without any obvious value judgments or emotions. Can be proven or disproven and are expressed in the form of a hypothesis
What is a normative statement
One which is subjective and based on opinion so cannot be proven or disproven. It often includes words like “ought, maybe, unwise, should etc. or says one is better than the other.
Value judgments
These can influence economic decision making and policy. Different economists may make different judgments from the same statistic
The Economic problem:
-problem of scarcity
-renewable and non-renewable resources
-opportunity costs
Problem of scarcity
People have finite needs but infinite wants as no one would choose to live at the level of basic human living standards. Although wants are infinite, recourses are finite. It is a relative concept as recourses are not necessarily scarce themselves but are scarce in relation to the demand placed upon them.
Renewable recourses
They are recourses of economic value that can be replenished or replaced on a level equal to consumption. E.g. oxygen, solar power and fish.
As long a the rare of consumption is less than or equal to the rate of replenishment, the stock will not decrease.
Non-renewable resource
A resource of economic values that cannot be readily replaced by natural means on a level equal to consumption.
What are opportunity costs
When the same recourse cannot be used to produce different goods at the same time so decisions have to be made on how to use them.
It is the cost of one thing in terms of the next best option which has been given up.
Difference between consumers choice and producers and the government choice on the opportunity costs
Consumers make choices on what gives them greatest level of satisfaction
Produces make a choice based on profit
Government must make decisions on where they should spend limited tax tenues based on what will maximise social welfare.
Four factors of production:
Land - natural resources used in production
Labour - all productive human effort (value of worker is human capital)
Capital - all man made recourses that are used to produce goods and services in the future. Owners of capital receive interest on their land.
Entrepreneurship - willingness and ability to take the risk of combining other three factors
What do production possibility frontiers show
Shows the maximum possible combinations of capital and consumer goods that can be produced with its current resources and tech
What are PPF diagrams usually drawn as a curve
Because the first recourses that are switched from capital to consumer good production are resources that are it adding much to capital goods but will be much more productive in the production of consumer goods and vice verse
Maximum potential of an economy (PPF)
It is any point on the curve that represents the maximum productive potential of the economy, the most that the country can produce
PPF graph representing growth of economy
The PPF maximum potential line will shift outwards as the economy can produce more of both goods. This can be achieved by increasing the quantity and quality of resource.
Reasons for decline in economy’s maximum potential
It can produce less of capital and consumer goods due to a number of factors: natural disasters, natural recourses running out or a decrease in quality/quantity due to war, migration or fall in spending on education
How is economic efficiency achieved
When recourses are used for their best fit - at all points on the PPF recourses are allocated efficiently.