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Econ 102 Final
study guide
61
Economics
Undergraduate 1
05/02/2012

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Term
Law of Demand
Definition
lower price, greater quantity demanded
increase - shirt curve to right
decrease - shift curve to left
Term
Normal Good
Definition
increase in income, increases the demand for the good
ex) cars, electronics, restaurant meals
Term
Inferior Good
Definition
increase in income,decrease demand. Things that you buy because you don't have a lot of money.
ex)ramen noodles
Term
Substitutes
Definition
decrease price of good leads to decrease in demand for other good. curve shifts down and left
ex) decrease price of Pepsi will decrease the demand for Coke.
Term
Complements
Definition
Things that go together. Decrease of price of good leads to increase in demand for other good. Greater consumption of Good A encourages greater consumption of Good B. (shift up and right)
Term
Shift supply curve
Definition
decrease in costs increases supply, shifts supply curve down and to right. Increase in cost decreases supply, shifting supply curve up and to the left.
Term
Expectations
Definition
If suppliers expect the price to increase in the future we will have an incentive to sell less today so they can store goods for future sale. (shift to left)
Term
Law of Supply
Definition
higher the price, greater quantity supplied. As price of good increases, suppliers attempt to max profits by increasing quantity sold.
Term
Producer surplus
Definition
producer's gain from exchange, or the difference between the market price and min price at which producer would be willing to sell a quantity.
Term
Total producer surplus
Definition
measured by the area above the supply curve and below the price
Term
Consumer surplus
Definition
consumer's gain from exchange, or difference between max price a costumer is willing to pay and the market price.
Term
Total consumer surplus
Definition
adding up consumer surplus for each consumer and for each unit. Measured by the area beneath the demand curve and above the price.
Term
equilibrium
Definition
quantity demanded =quantity supplied. Prices and supply shift according to competition.
Term
Surplus
Definition
quantity supplied < quantity demanded - suppliers want to sell more than what is demanded. Price above equilibrium price. Companies want to decrease prices so they can feel more than competitors.
Term
Equilibrium price
Definition
quantity demanded = quantity supplied - ultimate goal
sellers compete with sellers
buyers compete with buyers
Term
satisfied wants
Definition
the price at which the buyer is willing to pay for and suppliers will be willing to sell for
Term
Unexploited gains from trade
Definition
Quantity < Equilibrium Quantity
= consumer surplus + producer surplus
- good for buyers not for sellers
ex) buyers willing to buy at $57 and sellers are willing to sell at $15, so _____ would be $42
Term
Elasticity of demand(supply)
Definition
change in quantity demanded(supply)/change in price. (More responsive, more elastic. So the bigger the difference in the quantity demand, the more elastic)
Term
Percentage change in price
Definition
change in price/average price
Term
Elastic
Inelastic
Unit Elastic
Definition
[E>1]
[E<1]
[E=1]
always take absolute value
Term
Substitutes
Definition
not having a lot of substitutes = inelastic demand
Demand for luxuries more elastic than demand for necessities.
Term
Revenue
Definition
Price x Quantity
Term
Inelastic
Definition
revenues go up when price goes up (because people don't stop buying things even when price is increased.
Term
Elastic
Definition
revenues go down when the price go up (people buy less when the prices are increased).
Term
Unit Elastic
Definition
change in price is exactly matched by an equal and
opposite percentage change in quantity so revenues stay the same
Term
Cross-Price Elasticity of Demand:
Definition
Compares two different things and how responsive one product’s quantity is to the price of another. Measures how responsive a product’s quantity demanded is to ANOTHER product’s change in price.
Term
Price Ceilings
Definition
Max price allowed by law that creates shortages, reductions in product quality, a loss of gains from trade, misallocation of resources
Term
Reductions in product quality
Definition
Sellers have more customers than they have goods and sellers can’t raise the prices like they normally would
Term
Loss of gains from trade
Definition
If demanders are willing to pay $3.00 for something while suppliers are willing to sell for
$2.00, there is a $1.00 potential gains from trade split between them. But since there is a price ceiling, it is illegal to do so, so that $1.00 becomes known as deadweight loss
Term
Misallocation of resources
Definition
Usually, high demand increases prices. But since prices cannot be increased, things are
misallocated (not used where they are needed most) because there is no incentive for
suppliers.things are allocated at RANDOM so the high valued uses are just as likely as low valued uses to be satisfied.
Term
Rent Control
Definition
price ceiling on rental housing that creates shortages, reduction in quality, wasteful lines, increase cost of search, cause a loss of gains for trade (landlords have more customers than apartments so they can pick and choose choose among prospective renters), Misallocation of resources (people with a high willingness to pay can’t buy as many houses as they want and others with a low willingness to pay consume more housing than they would want to purchase)
Term
Empirical 1
Definition
For price ceiling to be truly effective, price ceiling should be lower than equilibrium price.
Term
Empirical Rule 2
Definition
If the price ceiling is truly effective, the quantity traded will decrease and in general goods will be randomly allocated to consumers. So the price that producers are willing to sell at is much lower (because the quantity sold is LOWER) than what consumers are willing to buy. This is because the buyers with the highest valued uses can’t outbid other buyers, so goods will flow to ANY buyer willing to pay more than the controlled price.
Term
Price Floor
Definition
A minimum price allowed by law that creates surpluses, deadweight loss, wasteful increases in quality, misallocation of resources.
Term
Tax
Definition
price paid by buyers - price received by sellers
Term
Deadweight Loss
Definition
The loss of the total consumer and producer surplus that could have been gained from the trade off. Larger when the demand curve is more elastic.
Term
Total Revenue
Definition
P X Q
Term
Total Cost
Definition
Cost of producing a given quantity
Term
fixed cost
Definition
cost that does not vary with output
Term
variable cost
Definition
cost that does vary with output
Term
marginal revenue
Definition
change in total revenue from selling an additional unit
Term
marginal cost
Definition
change in total cost from producing an additional unit
Term
Profit
Definition
what you make. (P-ATC) x Q
Term
free market
Definition
total cost of production are minimized because MC1 = MC2. Increases wealth by letting the U.S buy goods from lowest cost producers.
Term
Market power
Definition
power to raise price above marginal cost without fear that other firms will enter the market (monopoly has this)
Term
natural monopoly
Definition
exists when a single firm can supply the entire market at a lower cost than two or more firms
Term
Barriers to entry
Definition
factors that increase the cost to new firms of entering an industry. One firm can own an input that is difficult to duplicate (like Saudi Arabia and oil)
Term
Arbitrage
Definition
taking advantage of price differences for the same good in different markets by buying low in one market and selling high in another market (Combvir is cheaper in Africa than Europe)
Term
Perfect price discrimination
Definition
each customer is charged his or her maximum willingness to pay
Term
bundling
Definition
requiring that products be bought together in a bundle or package. Explained as a way to reduce costs
ex)Nike pair of shoes or Microsoft Office
Term
Tying
Definition
one good called the base good is tied to another good called the variable good
ex) hp printer and ink
Term
positive externality
Definition
he spends money on the cute puppy and he made other people’s lives happier when he would go to the street and everyone would pet them.
Term
negative externality
Definition
the dog barking so this causes annoyance for the neighbors
Term
externality
Definition
External costs (negative) or external benefits (positive).
External market happening because not all of the costs/benefits in the market have been accounted for and the problem is that the market will produce too much bad stuff (like pollution or barking dogs) or not going to produce enough stuff (like good vaccines or puppies). Usually the benefits and costs in a transaction only involve the trade parties, but sometimes they could leak to bystanders.
Term
externality occurs
Definition
1. The action of one economic agent affects the welfare of other agents
2. No change in compensation or the change in welfare
Term
negative externality
Definition
Professor Vazquez has a dog that barks a lot and affects the welfare of neighbors and he’s not compensating his neighbors
Term
Externalities outcome is always inefficient
Definition
Not socially optimal. This means there is too little of the positive externalities and there is too much of the negative externalities.
Term
private cost
Definition
price paid by the consumer
Term
external cost
Definition
cost paid by people other than the consumer or the producer trading in the market. paid by bystanders to the transaction
Term
social cost
Definition
cost to everyone (private + external)
Term
Externalities significant
Definition
market works less well and govt. action can increase surplus
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