determinants of demand
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price: price of good itself
non-price: WETPIGS
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determinants of demand
price: price of good itself
non-price: WETPIGS
definition of Demand
quantity of good that consumers are willing and able to buy at each possible price in a given period of time, ceteris paribus
definition of Quantity Demanded
quantity of good that consumers are willing and able to buy at a given price in a given period of time, c.p
what are substitutes?
definition: pair of good that are considered by consumers to be alternatives of each other as the level of utility derived from consuming either good is relatively similar
in competitive demand (e.g. coffee and tea as choice of beverage)
evaluate: function, price and availability to choose which good to consume
effect: when qty DD increases for coffee (point on the same curve), entire demand curve shifts to the left for tea
what are complementary goods?
definition: pair of good consumed together to satisfy the same want
in joint demand (e.g. car and petrol)
there are strong and weak complements
effect: when qty DD increases for cars (point on same curve), entire demand curve for petrol shifts to the right for petrol
what are goods in derived demand?
definition: demand for one good occurs as a result of the demand for another
goods in derived demand are bought by different economic agents (as factors inputs and final products)
e.g. steel (factors of production) and cars (final products by consumers)
what challenges the trend for 'income changes' and 'expectation of future prices'?
for inferior good, with increasing income, consumers will consume less of such inferior goods but more of normal goods
for perishable goods, the prices will have minimal effect as the goods cannot be stored for long periods of time
definition of Supply
quantity of good or service that producers are willing and able to sell at every possible price in a given period of time, cp
what is MB/MC?
consumers POV: additional benefit/cost of consuming an additional unit of good or service
producers POV: additional benefit/cost of supplying an additional unit of good or service
determinants of Supply
price: price of good itself
non-price:
Weather
Expectation of future prices
Technology — affects MCOP
Price of related goods
Inputs of production (price) — affects MCOP
Government policies
Sellers in the market
goods in joint supply
definition: production of more of one products leads to the production of more of the other
e.g. cow hide and beef steak → simultaneously produced
effect: increase in qty SS of cow hide, shift of supply curve to the right for beef steak
goods in competitive supply
definition: increased production of one means diverting resources away from producing the other
e.g. corn and ethanol
definition of Equilibrium
position of balance from which there is no inherent tendency to deviate in the absence of an exogenous change
what are the functions of price mechanism?
rationing: for whom to produce?
signalling: reflected by rise/fall in prices to show shortages/surpluses
incentive: what and how much to produce?
definition of PED
measure of the degree of responsiveness of the quantity demanded for a good to a change in price of the good itself, cp
demand is said to be price inelastic when a given change in price results in a...
less than proportionate change in quantity demanded in the opposite direction, cp
IPEDI < 1
demand is said to be price elastic when a given change in the price of a good results in a...
more than proportionate change in quantity demanded in the opposite direction, cp
IPEDI > 1
determinants of PED
Availability and closeness of substitutes S
Addiction (more price inelastic) A
Proportion and income spent on the good I
Degree of necessity (more price inelastic) N
Time period T
definition of PES
measure of the degree of responsiveness of quantity supplied to a given change in price of a good, cp
supply is said to be price elastic when a given change in price of a good results in a...
more than proportionate change in quantity supplied in the same direction, cp
supply is said to be inelastic when a given change in price of the good results in a...
less than proportionate change in quantity supplied in the same direction, cp
types of PED/PES besides elastic and inelastic
Unitary price elastic demand/supply — IPEDI / PES= 1 (proportionate change)
Perfectly price inelastic demand/supply — IPEDI / PES= 0 (no change)
Perfectly price elastic demand/supply — IPEDI / PES= ∞ ( infinitely large change)
determinants of PES
Availability of stock S
Existence of spare capacity SC
Mobility of factors of production [geographical and occupational mobility] FOP
Time period T
limitations of elasticity concepts
Accuracy and reliability of data
Ceteris paribus condition
Revenue vs profit
definition of taxes
levy imposed by government upon the sales of good and services and are paid to the tax authorities, not by the consumers, but indirectly by the producers
purpose: decrease consumption/production or generate government revenue
definition of subsidy
provision of financial assistance by the government to encourage the production or consumption of a good or service
purpose: increase consumption/production or making goods more affordable