BEC 5 Market influence Flashcards
Demand curve
maximum quantity of a good that consumers are willing and able to purchase at each and every price
Quantity demand
quantity of a good individuals are willing and able to purchase at each and every price
Change in quantity demanded
change in the amount of a good demanded resulting from a change in price
Change in demand
change in the amount of a good demanded resulting from a change in something other than the price of the good
Fundamental law of demand
price of a product and the quantity demanded of that product are inversely related. As the price of the product increases, the quantity demanded decreases.
Quantity demanded is inversely related to price for two reasons
- Substitution effect - consumers tend to purchase less of goods when their price rises in relation to the price of other goods.
- Income effect - prices are lowered with income remaining constant, people will purchase more of all of the lower priced products
Factors that shift demand curves
- Changes in wealth
- Changes in the price of related goods
- Changes in consumer income
- Changes in consumer tastes or preferences for a product
- Changes in consumer expectations
- Changes in the number of buyers served by the market
Supply curve
the maximum quantity of a good sellers are willing and able to produce at each and every price.
Quantity supplied
the amount of a good that producers are wiling and able to produce at each and every price
Change in quantity supplied
a change in the amount producers are willing and able to produce resulting from a change in price
Change in supply
a change in the amount of a good supplied resulting from a change in something other than the price of the good
Factors that shift supply curves
- Changes in price expectations of the supplying firm
- Changes in production costs
- Changes in the price or demand for other goods
- Changes in subsidies or taxes
- Changes in production technology
Market equilibrium
there are no forces acting to change the current price/quantity combination
Changes in equilibrium
a. Effects of a change in demand on equilibrium
b. Effects of a change in supply equilibrium
c. General effects of changes in demand and supply on equilibrium
Market clearing
market will eventually be cleared of all excess supply and demand (no price changes)
Changes and effects
- Change in Demand - 2. Change in Supply - 3. Effect on Equilibrium Quantity - 4. Effect on Equilibrium Price
- Increase - 2. Increase - 3. Increase - 4. ?
- Increase - 2. Decrease - 3. ? - 4. Increase
- Decrease - 2. Decrease - 3. Decrease - 4. ?
- Decrease - 2. Increase - 3. ? - 4. Decrease
Government intervention in market operations
- Price ceilings - established below the equilibrium price which causes shortages to develop. Price ceilings cause prices to be artificially low, creating a greater demand than the supply available
- Price floors - a min price set above the equilibrium price, which causes surpluses to develop. Price floors are min prices established by law, like min wage.
Elasticity of demand and supply
Elasticity is a measure of how sensitive the demand for or the supply of a product is to a change in price
Price elasticity of demand
% change in quantity demanded divided by % change in price
Measuring the price elasticity of demand
- Point method
2. Midpoint method
Point method
measures the price elasticity of demand at a particular point on the demand curve
Price Elasticity of Demand = % change in quantity demand / % change in price
Midpoint method
measures the price elasticity of demand between any two points on the demand curve
E = ((Q2 - Q1) / (Q2 + Q1)) / ((P2 - P1) / (P2 + P1))
Price inelasticity
- demand for a good is price inelastic if the absolute price elasticity of demand is less than 1.0.
- The smaller amt the less elastic
- 0.0 perfect inelastic
Price elasticity
the absolute price elasticity of demand is greater than 1.0
Unit elasticity
- the absolute price elasticity of demand is equal to exactly 1
- % change in the quantity demanded caused by a price change equals % change in price
Factors affecting price elasticity of demand
- product demand is more elastic with more substitutes available but is inelastic if few substitutes are available
- the longer the time period, the more product demand becomes elastic because more choices are available
Price elasticity effects on total revenue
a. Effects of price inelasticity on total revenue - an increase in price results in a decrease in quantity demanded that is proportionally smaller than the increase in price. Revenue will increase
b. Effects of price elasticity on total revenue - an increase in price results in a decrease in quantity demanded that is proportionally larger than the increase in price. Revenue will decrease
c. Effects of unit elasticity on revenue - a change in price will have no effect on total revenue
Price elasticity of demand
Elastic > greater than 1 - Price UP then revenue Down - Price DOWN then Revenue UP
Inelastic < less than 1 - Price UP then Revenue UP - Price DOWN then Revenue DOWN
Unit elastic = equal 1 - Price UP then revenue same - Price DOWN the revenue same
Price Elasticity of Supply
Price elasticity of supply = % change in quantity supplied / % Change in price
Price inelasticity
Supply < 0
absolute price elasticity of supply is less than 1.0
Price elasticity
Supply > 0
absolute price elasticity of supply is greater than 1.0
Unit elasticity
Supply = 1.0
absolute elasticity price of supply is equal to 1.0
Factors affecting price elasticity of supply
- feasibility of customers storing the product will affect the price elasticity of supply
- the time it takes to produce and supply the good will affect the price elasticity of supply
Price Elasticity effects on revenue
Elastic Greater than 1 - Price UP then Revenue Down - Price Down then Revenue UP
Inelastic Less than 1 - Price UP then Revenue UP - Price Down then Revenue Down
Unit Elastic equal 1- Price UP then Revenue the same, Price Down then Revenue the same
Price elasticity of supply
Price elasticity of supply = % change in quantity supplied / % change in price
% Change = (New - Old) / Old
Cross elasticity
% change in the quantity demanded of one good caused by the price change of another good
Cross elasticity of demand / Supply = (% change in number of units of X demanded) / % change in price of Y
Substitute goods: Positive coefficient
if coefficient is positive, the two goods are substitutes
Price of A goes up, so people start buying cheaper B
Complement goods: Negative coefficient
If coefficient is negative, the commodities are complementary
Price of A goes up, people buy less of B too
Income elasticity of demand
measures % change in quantity demanded for a product for a given % change in income
Income elasticity of demand = % change in # of units of X demanded / % change in income
Positive income elasticity
the good is a normal good and its demand is positively related to income (income goes up, demand up like steak or lobster)
Negative income elasticity
the good is an inferior good and its demand is inversely related to income (income goes up, demand is down like canned vegetables)
Production concept
- Total product = total amount of output produced
- Marginal product = change in total product resulting from a one unit increase in the quantity of an input employed.
- Average product = total product divided by the quantity of an input
The short run
a period of time in which some of the inputs used for production are fixed
The long run
a period of time in which all of the inputs used for production are variable
Law of diminishing returns
when more and more units of an input are combined with a fixed amount of other inputs, output increases but at a diminishing rate
Cost of functions
- Average fixed cost
- Average variable cost
- Average total cost
- Marginal cost
Average fixed cost
Total fixed costs / Quantity
Average variable costs
Total variable costs / Quantity