*Demand – the desire to own something and the ability to buy it
*Law of Demand – consumers will buy more of a good when its price is lower and less when its price is higher
Substitutes –goods that are used in place of one another
Demand Schedule – a table that lists the quantity of a good that a peson will purchase at various prices in a market
*Market Demand schedule – a table that lists the quantities demanded of a good at various prices by all consumers in the market
Ceteris Paribus – a latin phrae that means “all other things held constant”
Inferior Goods – a good that consumers demand less of when their incomes increase
Complements – two goods that are bought and used together
*Demand Elasticity – how sensitive a products demand is based on price
*Inelastic – describes demand that is not very sensitive to price changes
*Total Revenue – the total amount of money a company receives by selling goods and services
*Supply – the amount of a good or service that is available
*Law of Supply - producers offer more of a good or service as its price increases and less as its price falls
Supply Schedule – a chart that lists how much of a good or service a supplier will offer at various prices
*Supply Curve – a chart that lists how much of a good or service a supplier will offer at various prices
*Profit – the amount of mone a business receives in excess of its expenses
*Elasticity of Supply – a measure of the way quantity reacts to a change in price
Marginal Product of Labor – the change in output that results from hiring one additional unit of labor
*Increasing Marginal Return - the level of production in which the marginal product of laor increases as the number of workers increases
*Diminishing Marginal Return - the level of production in which the marginal product of labor decreases as the number of workers increases
*Negative Marginal Return – when the addition of a unit of labor actually reduces total output
Fixed Costs – a cost that does not change no matter how much of a good or service is produced
Variable Costs – a cost that rises or falls depending on the quantity produced
Total Cost – the su of fixed costs and variable costs
Average Total Cost – total cost dived by quantity produced
*Marginal Cost – the extra cost of adding one unit
Marginal Revenue – the additional income from selling one more unit of a good or service sometimes equal to price
Marginal Benefit – the extra benefit of adding one unit
*Operating Cost – the cost of operating a facility such as a factory or a store
*Subsidy – a government payment that support a business or market
Excise Tax – a tax on the total value of the money and property of a person who has died
Regulation – government intervention in a market that affects the production of a good
*Surplus – when quantity supplied is more than quantity demanded
Shortage – when quantity demanded is more than quantity supplied
*Equilibrium Price – price in which demand and supply are equal
*Price Ceiling – a maximum price that can legally be charged for a good or service
*Price Floor – a minimum price for a good or service
Black Market – a market in which goods ar sold illegally, without regard for government controls on price or quantity