1.2 How Markets Work Flashcards
Rational consumer behaviour
Aim to maximise utility (satisfaction)
Rational firm behaviour
Aim to maximise profit to keep shareholders happy
Rational government behaviour
Aim to maximise social welfare as they are voted in by the public
Demand
The ability and willingness to buy a particular good at a given price and at a given moment in time
Conditions of demand
Population - high population, increased demand.
Income - increase in income, increased demand (more people can afford product).
Related goods - related to XED.
Advertising - good advertising, increased demand. Good advertising from rival, less demand.
Taste/fashion - more fashionable good, increased demand
Expectations - expecting shortage or increased price of good, increased demand.
Seasons e.g hot summers, increased demand for sunscreen
Gov legislation - legal requirement, increased demand
Law of diminishing marginal utility
The satisfaction derived from the consumption of an additional unit of a good will decrease as more of a good is consumed
PED
The responsiveness of the quantity demanded for a product given a change in price
%change in QD/%change in price
PED numerical values
PED=1 - unitary elastic (change in QD = change in P)
PED>1 - relatively elastic (QD>P)
PED<1 - relatively inelastic (QD<P)
PED = infinite - perfectly elastic
PED = 0 - perfectly inelastic
PED factors
Availability of substitutes - more substitutes, PED elastic.
Time - longer time to produce good, people can find an alternate supplier of product, PED elastic.
Necessity - Necessary, PED inelastic
% of total expenditure - small%, price increase will not affect QD, PED inelastic.
Addictive - PED inelastic
PED and revenue
Elastic demand curve - decrease in price leads to increase in revenue and vice versa
Inelastic demand curve - decrease in price leads to an decrease in revenue and vice versa
Unitary elastic curve - change in price does not affect total revenue
YED
The responsiveness of quantity demanded for a good given a change in income.
%change in QD/%change in income
YED numerical values
YED<0 - inferior good (rise in income leads to fall in demand for this good)
YED>0 - normal good (rise in income leads to rise in demand for this good)
YED>1 - luxury good
Significance of YED
Important for businesses to know how their sales will be affected by a change in income.
Impact on type of goods that a firm produces.
XED
The responsiveness of quantity demanded for one product given the change in price of another good
%change in QD of goodA/%change in price of goodB
XED numerical values
XED>0 - substitutes (positive relationship)
XED<0 - complementary (negative relationship)
XED=0 - unrelated goods (no effect)
The size of the integer represents the strength of the relationship (the larger, the stronger the relationship)
Significance of XED
Firms need to know how price changes by other firms will impact them so they can take appropriate action
Competitive demand
Substitute goods that are in the same market (positive XED)
Joint demand
Goods that are compliments and are demanded together (negative XED)
Derived demand
Where a FOP is demanded not for what it is but for what it can provide e.g transport is demanded for a destination
Supply
The ability and willingness to provide a good or service at a particular price at a given moment in time.
Joint supply
Where the production of one good automatically causes the production of another good e.g production beef produces leather.
Competitive supply
The production of one good prevents the supply of another.
Supply factors
COP - increase in costs, increase in price of goods (to avoid making loss), less supplied at each price, decrease in supply
Price of other goods- for joint supply, if price of other good increases, supply of the good will increase.
Weather - supply may be dependent on weather for supply e.g good weather=more supply
Technology - new technology = more productive efficiency = firms can produce more goods at same price
Goals of supplier - motivation for social welfare = more supplied even without profit incentive
Gov legislation - laws passed for goods to be mandatory = increased supply, however increased regulation= increased costs= less supply
Taxes and subsidies - tax decreases supply and subsidy increases supply
Producer cartels - some firms/countries may come together in order to decrease supply and therefore increase the price of good to increase profit
Price elasticity of supply
The responsiveness of quantity supplied given a change in price for the good.
%change in QS/%change in price
PES numerical values
PES=1 (unitary elastic) : QS changes by same % as price
PES>1 (relatively elastic) : QS changes by more than price
PES<1 (relatively inelastic) : QS changes by less than price
PES=infinity (perfectly elastic) : QS falls to 0
PES=0 (perfectly inelastic) ; no effect