TOPIC 3 ECO (chapter 6-8) Flashcards
demand
quantity of particular g/s consumers willing & able to purchase at various price levels at point in time
market demand
demand by ALL CONSUMERS for particular g/s
6 factors affecting market demand (similar to factors for individual demand) (i think the info is the same actually)
- price of g/s itself
- price of other g&s
- expected future prices
- changes in consumer tastes & preferences
- level of income
- size of population & age distribution
income distribution
way economy’s income spread among members of different social & socio-economic groups
network externality
behaviour of other consumers influence individual’s decision to demand g/s, affecting no. ppl purchasing the good
POSITIVE network externality (BANDWAGON EFFECT)
ppl demand good cause everyone else has one
NEGATIVE network externality (SNOB EFFECT)
demand for good is HIGHER when FEWER people own it (sports cars)
bandwagon vs snob
ceteris paribus
assumption to isolate relationship between 2 eco variables
‘other things being equal’ assuming all other factors affecting (demand) remain constant
+ 2 reasons why law of demand
quantity demanded by consumers falls as price rises
-price reduced, consumers buy more of product because 1. can afford to buy more of it 2. product cheaper compared with other g&s
hence, more ppl willing & able to buy good at lower price
what does demand curve look like
linear line with negative gradient (slopes downwards from left to right)
quantity demanded x-axis
price y-axis
result of PRICE CHANGES results in what movement of the demand curve?
ALONG (change positions WITHIN curve)
EXPANSIONS and CONTRACTIONS in demand
contraction: INCREASE price DECREASE quantity, UPWARD movement
change in other factors of demand, NOT price will lead to what movement in the demand curve?
SHIFT in demand curve
INCREASES and DECREASES in demand
shift RIGHT: INCREASE in demand
-consumers WILLING and ABLE to buy more of the product at EACH POSSIBLE PRICE than before
price elasticity of demand
measures responsiveness of quantity demanded to change in price
calculated as % change in QUANTITY demanded/% change in PRICE
ELASTIC demand
STRONG response to change in price
UNIT ELASTIC demand
PROPORTIONAL response to price change
total amount spent by consumers remain UNCHANGED
INELASTIC demand
WEAK response to price change
why is knowledge of price elasticity of demand important for business firms?
need understand PED for goods they sell to decide on OPTIMAL PRICING strategy
-demand relatively ELASTIC, lowering price GREATLY expand volume of sales –> ^total revenue
-demand relatively INELASTIC, firm increase price –> ^total revenue (reduction in sales < price increase)
why does the GVT need to know the PED?
-needs to understand PED when pricing g&s provides for community (eg. public transport fares)
need to predict effects of changes in indirect taxes (sales taxes, excise duties, special levies) imposes on goods eg. alcohol, tobacco and petrol
-taxes raises price of goods gauge responsiveness of demand to accurately estimate emount of revenue they’ll raise
-bc excise tax –> reduced sales, GVTS raise lower-than-expected amt revenue when imposing excise tax on good with HIGHER price ELASTICITY
total outlay method
direction
calcuate PED by observing effect of changes in price on REVENUE earned by producer
-price & revenue move SAME DIRECTION, demand INELASTIC
-OPP direction is ELASTIC
-revenue unchanged with price change, UNIT ELASTIC
how is total outlay (total expenditure by consumers) calculated
price x quantity
price ^ revenue ^ = ?
inelastic
price ^ revenue v = ?
elastic
price ^ revenue - = ?
unit elastic
perfectly in/elastic demand are the only 2 extreme circumstances where looking at the slop of the demand curve is _____ to determine the PED through the ENTIRE curve
SUFFICIENT, suitable
what does PERFECTLY ELASTIC demand look like on the demand curve? why?
pure comp
HORIZONTAL straight line ———–,
consumers demand unlimited quantity at certain price, but nothing at price above
ONLY THEORETICAL, this will never exist, although for INDIVIDUAL SELLERS, under certain circumstances in a perfectly competitive market (many buyers & sellers selling product basically same & can charge higher price since they’d lose all customers to others selling identical products)
PERFECTLY INELASTIC demand
consumers willing to pay ANY price to obtain given quantity of g/s (eg. life-threatening curing medication)
VERTICAL demand curve
price elasticity of demand for any good affected by 5 factors NSPTA
PANTS
- whether good is LUXURY or NECESSITY
- whether good has close SUBSTITUTES
- EXPENDITURE on product as PROPORTION of income
- LENGTH of time subsequent to PRICE CHANGE
- whether good is ADDICTIVE or not
how does the good being luxury/necessity affect PED?
necessities relatively INELASTIC demand (increase in price, quantity demanded wont fall much)
luxuries, PED expected to be higher
how does whether the good has any close substitutes affect PED?
eg. diff brands of breakfast cereal have HIGHLY ELASTIC demand (ppl switch to another brand perceived as equally good if price rises)
eg. few/no subs INELASTIC demand (cannot switch)
how does expenditure on the product as a proportion of income affect PED?
g&s take very small prop of income LOWER PED
demand for expensive items more ELASTIC (eg. 10% rise for gum < 10% for new car)
how does the length of time subsequent to a price change affect PED?
price of product ^, quantity demanded may not initially respond greatly
-consumers take time to become aware & adjust
-take time to seek alternatives & identify substitute products –> demand more responsive
also depend on whether good is DURABLE or not.
-after price changes, durable goods have more ELASTIC demand than non
-eg. rise price of new cars encourage repair than replace, –> demand HIGHLY ELASTIC –> over time decline elasticity (replace at some point)
how does whether a good is addictive affect PED?
cigarettes & alcohol relatively INELASTIC demand
supply
quantity of g/s all firms in particular industry willing & able to offer for sale at diff price levels at point in time
market supply
sum of individual firm supplies of individual producers at various price levels
itself other
main factors affecting market supply (same as inc/dec supply)
- price of g/s itself
- price of other g&s
- state of tech
- changes in cost of FOD
- quantity of good available
- climatic and seasonal infleunce
how does price of g/s itself affect market supply
future expectations
too low, some producers unable to cover costs of production & wont supply item
FUTURE PRICE EXPECTATIONS of g/s also influences
-supplier believes price ^ future, supply of g/s increase
-possibility of increased profits arising from supply of good
how does price of other g/s affect market supply?
quantity affected
-price of X same, price of Y ^, more profitable to produce Y
-firms less willing to supply X & more willing to produce & supply Y
hwo does state of technology affect market supply?
tech improvements lower production costs & allow firms to supply more goods at given price
allow firms to adjust production runs to quickly accommodate changing demand
-automated production-lines in vehicle industry greatly reduces production costs, ^ supply
how do changes in cost of FOP affect market supply?
fall –> rise
fall in cost of FOP allow firms supply more of good, rise more diff to maintain present supply, reliant on factor input
how does quantity of goods available affect supply?
overall limiting factor
many industries, NO. SUPPLIERS affects quantity of g/s available
-more suppliers enter industry, supply ^