Theme 1 section 3 Flashcards
(132 cards)
What is effective demand
effective demand is where people have to ability to pay (sufficient purchasing power)
price mechanism is related to effective demand
What are wants
wants are what people would like to buy- unsupported by the ability to pay
What is the law of demand
states that demand for a product varies inversely with its price
Which is why a demand cure slopes left to right
What was does a demand cure slope
Downward from left to right
What does ceteris paribus mean
means other things remaining the same
only one changing variable can be predicted
in this case price
Why is there Movement along demand curve
Any change in price will cause movement along the demand curve
What movement will occur on the demand curve if the price of the good decreases
if the price decreases more people want to buy so quantity demanded increases
This is known as extension
And down
What movement will occur on the demand curve if the price of the good increases
if the price increases people are less likely to buy so demand decreases this is known as contraction
and up
What way does the demand curve move if demand is increased
Right
what way does the demand curve move if demand decreases
left
what is contraction and extension for
price only
What is a normal good
a normal good is one which if price rises the demand will fall
What is rational choice
Economists make the assumption that consumers behave in a rational way - that all individuals make logical decisions that maximise their personal benefit (utility- personal satisfaction)
What is utility
utility is the satisfaction gained from consuming goods and services
can be measured by the price people are willing to pay for it
What is marginal utility
It is the additional satisfaction gained from consuming an extra unit of goods
What is total utility
The total amount of satisfaction gained from consuming a product in a period of time
Total utility is the sum of all marginal utilities gained from each unit consumed
What are the three reasons a demand curve slopes dwonward from left to right
-diminishing marginal utility
- the income effect
- The substitution effect
What is diminishing marginal utility
the more we consume of a good the less satisfaction (utility) we get from consuming one more unit of it. The more of the good we consume the less we are willing to pay
When the price falls we gain more utility, they buy more of this good and less of another
What is the income effect
As the price of a good falls existing consumers will see a rise in their ‘real income’
They have more income left over
Also lowering price opens them up to a wider market as it is now in more consumers income bracket
What is the substitutional effect
As the price of a product decreases it becomes relatively cheaper compared to rival goods, consumer demand then shifts towards cheaper alternatives
rational consumer shifts towards alternatives
What are other causes of shifts
tastes/trends/tech
income
marketing
changes in the econmy
changes in the price of complimentary goods
other factors
changes in population
changes in the price of substitutes
How does trend/tech/tastes effect demand
trends and fashions or advancement change consumers preferences so effect shifts in demand
Recent surges in smoothies and healthy drinks and therefore fall in demand for cola
demand falls for dvds after acessing films through netflix
How does income effect demand
When an individuals income goes up their ability to purchase increases causing an outward shift in demand curve
E.g demand for air travel has increased as a result of rising income
How does marketing affect demand
Firms invest huge amounts in marketing and advertising to make more consumers buy
Good campaigns mean demand will rise