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Econimics
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the study of the choices that individuals make given the presence of scarsity
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Scarcity
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limited resources but unlimited wants
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Poverty vs. scarcity
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not having everything you need vs. unlimited wants with limited resources
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Commodities
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economic goods and services; anything you buy or sell
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Economy
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the institutional structure through which individuals in a society coordinate their diverse wants
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Three big questions
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what and how much to produce? how to produce it? for whom to produce it?
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Allocation
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who gets what
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Economic reasoning
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making decisions on the basis of costs and benefits
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Economizing
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getting the maximum benefit at the minimum cost
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The economic decision rule
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If the marginal benefit of an action exceeds the marginal cost, do it. If the marginal costs of an action exceed the marginal benefits, don't do it.
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Opportunity cost
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the highest valued benefit that must be sacrificed as the result of choosing an alternative
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When price falls
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too much of the good
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When price increases
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not enough of the good
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Invisible hand
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the price mechanism of the market (Adam Smith)
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Economic theory
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generalizations about the working of an abstract economy
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Positive statement
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a statement that can be tested, proven or disproven
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Normative statement
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a statement of opinion, cannot be proven or disproven
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Roll of pure command government
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government with full control
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Roll of pure market government
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government with no intervention; laissez-faire
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Property rights of pure command government
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government with shared resources/property
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Property rights of pure market government
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government with private resource/property
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Coordination of pure command economic activity
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government actions determined by central planner
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Coordination of pure market economic activity
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government actions determined by market and price mechanism
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Pure command production (what)
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production of what government wants
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Pure market production (what)
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production of what people are willing to buy
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Pure command production (how)
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how production is done determined by government or central planning body
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Pure market production (how)
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how production is done by economizing, efficiency, and profit-maximizing
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Pure command production (who)
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production output for people based on equal distribution
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Pure market production (who)
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production output for people based on ability, effort, and inheritance
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Markets
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where buyers and sellers come together for exchange
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Quantity demanded
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the amount of a good that households want to consume given their income and prices in a given time period
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The demand curve
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when price goes up, demand goes down; when price goes down, demand goes up
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Law of demand
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as the price of a good increases, the quantity demanded falls, ceteris paribus
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Ceteris paribus
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holding all else constant
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Law of diminishing marginal benefit
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as more units of a good are consumed, additional units provide less benefit
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Supply
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thinking like the producer
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Quantity supplied
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the amount of a commodity that a firm plans to sell in a given time period at a given price
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The law of supply
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as the price for which a good can be sold increases, the quantity of that good is supplied will increase (ceteris paribus)
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The supply curve
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when price increases, quantity increases; when price decreases, quantity decreases
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The law of increasing costs
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to supply additional units of a good, producers have greater opportunity costs, so the price must rise to induce producers to supply greater quantities
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market equilibrium
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the point of intersection of demand and supply curves of a given commodity
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Disequilibrium
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if price is too high, there is a surplus. Lower the price to return to equilibrium; if price is too low, there is a shortage. Raise the price to return to equilibrium
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Excess supply (surplus)
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at any price, quantity supplies is greater than quantity demanded
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Excess demand (shortage)
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at any price, quantity demanded is greater than quantity supplied
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Changes in quantity demanded
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movement along the demand curve due to a change in price
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Changes in demand
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shifts of the demand curve due to changes in goods
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Scalping
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result of a shortage; set number that applies to selling tickets
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Economic pros of scalping
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helps price reach a true price equilibrium, generates a more efficient outcome, trade creates value
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Determinants of demand
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prices of related goods, changes in income, expected future price levels, population, and preferences
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Substitutes
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goods and services that can be used for the same purpose; price decreases when quantity decreases
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Complements
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two goods for which an increase in the price of one leads to a decrease in the demand for the other
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Normal good
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a good that consumers demand more of when their incomes increase; price increases when quantity decreases
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Inferior good
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a good that consumers demand less of when their incomes increase; price decreases when quantity decrease
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Changes in quantity supplied
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movement along the supply curve due to a change in price
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Changes in supply
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shift in the supply curve due to changes in the determinants of supply
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Determinants of supply
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prices of factors of production, technological advance, prices of goods related in production, the number of firms, expectations about future prices, taxes and subsidies, and natural disaster
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Substitutes in production
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goods that can be produced by using the same resources (writing paper and paper boxes)
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Complements in production
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goods that are produced together (beef and leather)