ECON 1010

1. Incentives Matter

  • Definition: Incentives are rewards and penalties that motivate behavior.

  • People respond in predictable ways to incentives of all kinds (e.g., fame, power, reputation, love, and grades).

2. Good Institutions Align Self-Interest with Social Interest

  • The Invisible Hand: When markets function effectively, self-interested individual behavior promotes overall social interest.

  • Market Failures: When markets fail to align these interests, government intervention (via taxes, subsidies, or regulations) can realign incentives.

3. Trade-offs Are Everywhere

  • Scarcity: A condition where resources are insufficient to satisfy all human wants.

  • Opportunity Cost: The value of the next-best alternative given up when a choice is made.

  • The Great Economic Problem: How to arrange limited resources to satisfy as many wants as possible.

  • Example (Drug Testing Trade-offs):

    • Drug Lag: Extra testing delays drug approval, causing harm to patients who could have benefited sooner.

    • Drug Loss: Increased testing costs discourage drug development, causing potential safe drugs to never be created.

4. Think on the Margin

  • Economic decision-making occurs "on the margin," meaning decisions involve weighing the additional benefits and costs of a little more or a little less.

  • Key Marginal Concepts:

    • Marginal Cost

    • Marginal Revenue

    • Marginal Tax Rates

5. Trade Makes People Better Off

  • Trade benefits parties beyond simple exchange by encouraging specialization and taking advantage of economies of scale.

  • Theory of Comparative Advantage: Individuals or nations benefit mutually by specializing in producing goods where they have the lowest opportunity cost and trading for others.

6. Wealth and Economic Growth Are Important

  • Economic growth generates wealth.

  • Wealthier nations enjoy higher standards of living, improved health outcomes, and longer life expectancy.

7. Institutions Matter

  • Institutions shape incentives to invest in physical capital, human capital, innovation, and efficient organization.

  • Key Supportive Institutions:

    • Property rights

    • Political stability

    • Honest government

    • Dependable legal system

    • Competitive and open markets

8. Economic Booms and Busts Cannot Be Avoided but Can Be Moderated

  • Economies naturally fluctuate with periodic booms and recessions (where output drops and unemployment rises).

  • Government fiscal and monetary policy can reduce the severity of fluctuations, though improper policy can increase volatility.

9. Inflation Is Caused by Increases in the Supply of Money

  • Definition: Inflation is an increase in the general or average level of prices.

  • Sustained increases in the money supply without a corresponding increase in the supply of goods cause price inflation.

  • High or unpredictable inflation undermines purchasing power and distorts economic calculation.

10. Central Banking Is a Hard Job

  • Central banks (such as the U.S. Federal Reserve) attempt to stabilize recessions and manage money supply.

  • Policy actions operate with time lags, while economic conditions continuously change.


1. Trade Creates Value and Aligns Preferences

  • Value Creation: Trade moves goods from people who value them less to people who value them more, creating value even without new production.

  • Trade benefits participants by accommodating differing individual preferences.

2. Specialization, Productivity, and Division of Knowledge

  • Specialization: Without trade, individuals cannot specialize and must produce all basic necessities themselves. Trade enables individuals to specialize in a single good or service.

  • Productivity Gains: Specialization increases total output because specialized workers develop deeper knowledge and can leverage large-scale equipment.

  • Division of Knowledge:

    • Without trade, societal knowledge is limited to what a single human brain can store.

    • With specialization and trade, total societal knowledge expands far beyond individual capacity, dramatically boosting overall productivity and output.

3. Comparative Advantage

  • Absolute Advantage: The ability to produce the same good using fewer inputs than another producer.

  • Comparative Advantage: The ability to produce a good or service at a lower opportunity cost than another producer.

  • Production Possibilities Frontier (PPF): A graphical representation showing all combinations of goods that an economy can produce given its inputs and productivity.

  • Benefits of Trade: A country does not need an absolute advantage in any good to benefit from trade. Trade depends on comparative advantage; specializing in goods with the lowest opportunity cost maximizes overall production and mutual gains.

4. Comparative Advantage, Wages, and Globalization

  • Wages and Productivity: Differences in national wage levels reflect differences in overall labor productivity. Trade raises wages as high as possible given a country's productivity level.

  • Globalization: Increased global trade expands total wealth. While trade induces structural shifts—moving workers from low-demand sectors to high-demand sectors—it ultimately increases living standards across trading nations.


1. Demand and the Demand Curve

  • Definitions:

    • Demand Curve: A function that shows the quantity demanded at different prices.

    • Quantity Demanded: The quantity that buyers are willing and able to buy at a particular price.

  • Reading a Demand Curve:

    • Horizontally: At a given price, determines how much consumers are willing to buy.

    • Vertically: At a given quantity, determines the maximum price consumers are willing to pay.

  • The Law of Demand:

    • Demand curves are negatively sloped; lower prices lead to a greater quantity demanded.

    • At higher prices, consumers use goods only for their most valuable uses. As prices fall, goods are allocated toward lower-valued uses.

  • Consumer Surplus:

    • Definition: The consumer's gain from exchange, calculated as the difference between the maximum price a consumer is willing to pay and the actual market price.

    • Total Consumer Surplus: Represented graphically by the area beneath the demand curve and above the market price.

2. Factors That Shift the Demand Curve

  • Shift Direction:

    • Increase in Demand: Curve shifts outward (right); consumers buy more at each price.

    • Decrease in Demand: Curve shifts inward (left); consumers buy less at each price.

  • Demand Shifters:

    1. Income:

    • Normal Goods: Demand increases as income rises.

    • Inferior Goods: Demand decreases as income rises.

    1. Population: Overall population growth or demographic shifts alter total market demand.

    2. Prices of Substitutes: A substitute is a good consumed in place of another. A drop in the price of a substitute decreases demand for the original good.

    3. Prices of Complements: Complements are goods consumed together. A drop in the price of a complement increases demand for the primary good.

    4. Expectations: Anticipated future shortages or price increases boost current demand.

    5. Tastes and Preferences: Shifts in consumer tastes, fads, fashion, or advertising alter demand.

3. Supply and the Supply Curve

  • Definitions:

    • Supply Curve: A function showing the quantity supplied at different prices.

    • Quantity Supplied: The quantity that sellers are willing and able to sell at a specific price.

  • Reading a Supply Curve:

    • Horizontally: At a given price, determines the quantity suppliers are willing to sell.

    • Vertically: For a given quantity, determines the minimum price sellers must receive to produce it.

  • The Law of Supply:

    • Supply curves are positively sloped; higher prices encourage producers to increase quantity supplied.

    • As price rises, higher-cost production methods and regions become profitable.

  • Producer Surplus:

    • Definition: The producer's gain from exchange, calculated as the difference between the market price and the minimum price at which a producer is willing to sell.

    • Total Producer Surplus: Represented graphically as the area above the supply curve and below the market price up to the quantity traded.

4. Factors That Shift the Supply Curve

  • Shift Direction:

    • Increase in Supply (Cost Decrease): Curve shifts down and to the right; sellers offer more at every price.

    • Decrease in Supply (Cost Increase): Curve shifts up and to the left; sellers offer less at every price.

  • Supply Shifters:

    1. Technological Innovations and Input Prices: Technological advancements or lower input prices reduce production costs, increasing supply.

    2. Taxes and Subsidies: Taxes raise production costs (shifting supply left); subsidies lower costs (shifting supply right).

    3. Expectations: Anticipation of higher future prices leads suppliers to withhold stock, decreasing current supply.

    4. **Entry or Exit of Producers


1. Incentives Matter

  • Definition: Incentives are rewards and penalties that motivate behavior.

  • People respond in predictable ways to incentives of all kinds (e.g., fame, power, reputation, love, and grades).

2. Good Institutions Align Self-Interest with Social Interest

  • The Invisible Hand: When markets function effectively, self-interested individual behavior promotes overall social interest.

  • Market Failures: When markets fail to align these interests, government intervention (via taxes, subsidies, or regulations) can realign incentives.

3. Trade-offs Are Everywhere

  • Scarcity: A condition where resources are insufficient to satisfy all human wants.

  • Opportunity Cost: The value of the next-best alternative given up when a choice is made.

  • The Great Economic Problem: How to arrange limited resources to satisfy as many wants as possible.

  • Example (Drug Testing Trade-offs):

    • Drug Lag: Extra testing delays drug approval, causing harm to patients who could have benefited sooner.

    • Drug Loss: Increased testing costs discourage drug development, causing potential safe drugs to never be created.

    

4. Think on the Margin

  • Economic decision-making occurs "on the margin," meaning decisions involve weighing the additional benefits and costs of a little more or a little less.

  • Key Marginal Concepts:

    • Marginal Cost

    • Marginal Revenue

    • Marginal Tax Rates

    

5. Trade Makes People Better Off

  • Trade benefits parties beyond simple exchange by encouraging specialization and taking advantage of economies of scale.

  • Theory of Comparative Advantage: Individuals or nations benefit mutually by specializing in producing goods where they have the lowest opportunity cost and trading for others.

6. Wealth and Economic Growth Are Important

  • Economic growth generates wealth.

  • Wealthier nations enjoy higher standards of living, improved health outcomes, and longer life expectancy.

7. Institutions Matter

  • Institutions shape incentives to invest in physical capital, human capital, innovation, and efficient organization.

  • Key Supportive Institutions:

    • Property rights

    • Political stability

    • Honest government

    • Dependable legal system

    • Competitive and open markets

    

8. Economic Booms and Busts Cannot Be Avoided but Can Be Moderated

  • Economies naturally fluctuate with periodic booms and recessions (where output drops and unemployment rises).

  • Government fiscal and monetary policy can reduce the severity of fluctuations, though improper policy can increase volatility.

9. Inflation Is Caused by Increases in the Supply of Money

  • Definition: Inflation is an increase in the general or average level of prices.

  • Sustained increases in the money supply without a corresponding increase in the supply of goods cause price inflation.

  • High or unpredictable inflation undermines purchasing power and distorts economic calculation.

10. Central Banking Is a Hard Job

  • Central banks (such as the U.S. Federal Reserve) attempt to stabilize recessions and manage money supply.

  • Policy actions operate with time lags, while economic conditions continuously change.

  1. Trade Creates Value and Aligns Preferences

  • Value Creation: Trade moves goods from people who value them less to people who value them more, creating value even without new production.

  • Trade benefits participants by accommodating differing individual preferences.

  1. Specialization, Productivity, and Division of Knowledge

  • Specialization: Without trade, individuals cannot specialize and must produce all basic necessities themselves. Trade enables individuals to specialize in a single good or service.

  • Productivity Gains: Specialization increases total output because specialized workers develop deeper knowledge and can leverage large-scale equipment.

  • Division of Knowledge:

    • Without trade, societal knowledge is limited to what a single human brain can store.

    • With specialization and trade, total societal knowledge expands far beyond individual capacity, dramatically boosting overall productivity and output.

    

  1. Comparative Advantage

  • Absolute Advantage: The ability to produce the same good using fewer inputs than another producer.

  • Comparative Advantage: The ability to produce a good or service at a lower opportunity cost than another producer.

  • Production Possibilities Frontier (PPF): A graphical representation showing all combinations of goods that an economy can produce given its inputs and productivity.

  • Benefits of Trade: A country does not need an absolute advantage in any good to benefit from trade. Trade depends on comparative advantage; specializing in goods with the lowest opportunity cost maximizes overall production and mutual gains.

  1. Comparative Advantage, Wages, and Globalization

  • Wages and Productivity: Differences in national wage levels reflect differences in overall labor productivity. Trade raises wages as high as possible given a country's productivity level.

  • Globalization: Increased global trade expands total wealth. While trade induces structural shifts—moving workers from low-demand sectors to high-demand sectors—it ultimately increases living standards across trading nations.

1. Demand and the Demand Curve

  • Definitions:

    • Demand Curve: A function that shows the quantity demanded at different prices.

    • Quantity Demanded: The quantity that buyers are willing and able to buy at a particular price.

    

  • Reading a Demand Curve:

    • Horizontally: At a given price, determines how much consumers are willing to buy.

    • Vertically: At a given quantity, determines the maximum price consumers are willing to pay.

    

  • The Law of Demand:

    • Demand curves are negatively sloped; lower prices lead to a greater quantity demanded.

    • At higher prices, consumers use goods only for their most valuable uses. As prices fall, goods are allocated toward lower-valued uses.

    

  • Consumer Surplus:

    • Definition: The consumer's gain from exchange, calculated as the difference between the maximum price a consumer is willing to pay and the actual market price.

    • Total Consumer Surplus: Represented graphically by the area beneath the demand curve and above the market price.

    

2. Factors That Shift the Demand Curve

  • Shift Direction:

    • Increase in Demand: Curve shifts outward (right); consumers buy more at each price.

    • Decrease in Demand: Curve shifts inward (left); consumers buy less at each price.

    

  • Demand Shifters:

    1. Income:

    

- **Normal Goods**: Demand increases as income rises.

- **Inferior Goods**: Demand decreases as income rises.

    

1. **Population**: Overall population growth or demographic shifts alter total market demand.

2. **Prices of Substitutes**: A substitute is a good consumed in place of another. A drop in the price of a substitute decreases demand for the original good.

3. **Prices of Complements**: Complements are goods consumed together. A drop in the price of a complement increases demand for the primary good.

4. **Expectations**: Anticipated future shortages or price increases boost current demand.

5. **Tastes and Preferences**: Shifts in consumer tastes, fads, fashion, or advertising alter demand.

    

3. Supply and the Supply Curve

  • Definitions:

    • Supply Curve: A function showing the quantity supplied at different prices.

    • Quantity Supplied: The quantity that sellers are willing and able to sell at a specific price.

    

  • Reading a Supply Curve:

    • Horizontally: At a given price, determines the quantity suppliers are willing to sell.

    • Vertically: For a given quantity, determines the minimum price sellers must receive to produce it.

    

  • The Law of Supply:

    • Supply curves are positively sloped; higher prices encourage producers to increase quantity supplied.

    • As price rises, higher-cost production methods and regions become profitable.

    

  • Producer Surplus:

    • Definition: The producer's gain from exchange, calculated as the difference between the market price and the minimum price at which a producer is willing to sell.

    • Total Producer Surplus: Represented graphically as the area above the supply curve and below the market price up to the quantity traded.

    

4. Factors That Shift the Supply Curve

  • Shift Direction:

    • Increase in Supply (Cost Decrease): Curve shifts down and to the right; sellers offer more at every price.

    • Decrease in Supply (Cost Increase): Curve shifts up and to the left; sellers offer less at every price.

    

  • Supply Shifters:

    1. Technological Innovations and Input Prices: Technological advancements or lower input prices reduce production costs, increasing supply.

    2. Taxes and Subsidies: Taxes raise production costs (shifting supply left); subsidies lower costs (shifting supply right).

    3. Expectations: Anticipation of higher future prices leads suppliers to withhold stock, decreasing current supply.

    4. Entry or Exit of Producers: Entry of new producers increases supply; exit reduces supply.

    5. Changes in Opportunity Costs: An increase in the opportunity cost of producing a good shifts its supply curve up and to the left.

5. Market Equilibrium and the Adjustment Process

  • Definitions:

    • Equilibrium Price: The price at which quantity demanded equals quantity supplied (Qd=QsQ_d = Q_s).

    • Equilibrium Quantity: The quantity bought and sold at the equilibrium price.

  • Market Dynamics:

    • Equilibrium occurs at the intersection of the demand and supply curves.

    • Equilibrium price and quantity are stable; at any other price, market forces push price and quantity back toward equilibrium.

  • Market Disequilibrium:

    • Surplus: Occurs when quantity supplied is greater than quantity demanded (Qs>QdQ_s > Q_d). Excess supply causes sellers to lower prices.

    • Shortage: Occurs when quantity demanded is greater than quantity supplied (Qd>QsQ_d > Q_s). Excess demand causes buyers to bid prices up.

6. Free Markets and Maximizing Gains from Trade

  • Maximizing Surplus: A free market maximizes total surplus (consumer surplus plus producer surplus) under three conditions:

    1. Available goods are bought by buyers with the highest willingness to pay.

    2. Goods are sold by sellers with the lowest production costs.

    3. Between buyers and sellers, there are no unexploited gains from trade and no wasteful trades.

  • Efficiency Implications:

    • Trading at a quantity below equilibrium leaves unexploited gains from trade.

    • Trading at a quantity above equilibrium causes wasteful trades (production costs exceed valuation).

  • Experimental Verification:

    • In 1956, Vernon Smith tested supply and demand theory using laboratory experiments.

    • Results showed that real market behavior rapidly converges to predicted theoretical equilibrium, earning Smith the Nobel Prize in Economics in 2002.

7. Effects of Curve Shifts on Equilibrium

  • Shifts in Supply:

    • Decrease in Supply: Shifts the supply curve up and to the left, resulting in a higher equilibrium price and lower equilibrium quantity.

    • Increase in Supply: Shifts the supply curve down and to the right, resulting in a lower equilibrium price and higher equilibrium quantity.

  • Shifts in Demand:

    • Decrease in Demand: Shifts the demand curve down and to the left, resulting in a lower equilibrium price and lower equilibrium quantity.

    • Increase in Demand: Shifts the demand curve up and to the right, resulting in a higher equilibrium price and higher equilibrium quantity.

8. Key Terminology Distinctions

  • Demand vs. Quantity Demanded:

    • Change in Quantity Demanded: Movement along a fixed demand curve caused solely by a change in price.

    • Change in Demand: A