2.1 DEMAND Flashcards
what does the law of demand state
as price of a product increases (ceteris paribus), the quantity demanded will always decreases
what is demand
the amount of good or service consumers are willing and able to buy in a given MARKET, at a given PRICE in a given TIME PERIOD
what is a market
an area over which buyers and sellers come together to negotiate the exchange of a good or service (eg. market of chocolate is the market for a good whereas market for teachers is market for a service)
what are the assumptions underlying the law of demand
1 income effect
#2 substitution effect
#3 diminishing marginal utility
what is real income
refers to what consumers can buy with their income
explain income effect
- price of a product eg. sugary drinks increases
- consumers then have less real income (can buy less of the product eg. sugary drinks with their income)
- so consumers buy less product eg. sugary drinks
- results in decrease of quantity demanded
explain substitution effect
- price of product eg. sugary drinks increase
- consumers choose to get a substitute instead eg. water as it gives them more satisfaction for the money they pay
- less sugary drinks r bought
- quantity demanded decreases
explain diminishing marginal utility
the more of a product the consumer buys, the less satisfaction they get from consuming additional units
eg. the more strawberries u buy the less ur willing to pay the same price again and again for it
what does change in price do to a demand curve
causes movement ALONG the demand curve
what is a non price determinant of demand
factors other than price that affect the amount consumers are willing and able to buy (assuming ceteris paribus)
eg. income, preference, future price expectations
what is the relationship between an individual consumers demand and market demand (calculation)
total market demand = sum of all individual consumer demand
normal goods vs inferior goods
normal goods r luxuries eg phones
inferior goods r cheaper eg tesco value cheese
shifts of the demand curve
if demand increases D shifts right
if demand decreases D shifts left
what would happen to the demand curve of the market of an inferior [market] good if income [non price determinant] increase
D would shift left
- people are more able to buy normal goods rather than inferior goods as they have more real income
- people less willing to buy the inferior good
all the non price determinants
- income
- tastes/preferences
- future price expectations
- price of related goods
- number of consumers