Microeconomics Practice Problems and Key Concepts

Comprehensive vocabulary flashcards covering maximization, profit, substitution, scarcity, opportunity cost, comparative advantage, demand, relative prices, and market equilibrium based on the practice problems.

Profit

The financial gain calculated as $\text{Total Revenue} - \text{Total Cost}$.

Normal Rate of Return

The rate of return achieved when economic profit equals zero, indicating that a firm or individual earns the same return as competing alternative uses of their resources.

Above-Normal Rate of Return

A condition where profit is greater than zero, indicating that an individual or firm is earning a higher return than competitors with similar resources, which attracts competing firms into the market.

Principle of Maximization

The neoclassical economic assumption that all individuals, regardless of political or personal ideology, act as greedy maximizers attempting to achieve the best possible outcome given their circumstances.

Passive Income

An income stream generated with little ongoing effort; under the principle of maximization, the expectation of passive returns becomes capitalized into the upfront purchase price of the asset.

Principle of Substitution

The economic principle stating that individuals face choices involving tradeoffs and are willing to substitute one good, outcome, or value for another when relative costs change.

Theory of a Priority in Consumption

A non-economic theory proposing that people satisfy needs in a strict hierarchy (e.g., food, shelter, clothing, entertainment), which is contradicted by real-world behavior showing that individuals of all income levels make tradeoffs among competing wants.

Sunk Cost

A historical expenditure or sacrifice that cannot be recovered and should be ignored when making forward-looking economic decisions.

Variable Cost

A cost that changes with the level of output, which may or may not be sunk depending on the specific nature of the sacrifice.

Opportunity Cost

The value of the highest-ranked alternative forgone or sacrificed when making a choice.

Comparative Advantage

The ability of an individual or firm to produce a good at a lower marginal opportunity cost than another producer.

Absolute Advantage

The ability of a producer to create a larger total quantity of a good using the same amount of resources compared to another producer.

Joint Production Possibility Curve

A graphical representation showing the maximum combined output possibilities for two producers specializing in different goods based on comparative advantage.

Diminishing Marginal Value

The economic principle stating that as an individual consumes additional units of a good, the value assigned to each successive unit decreases.

Law of Demand

The economic principle stating that, holding other factors constant, an inverse relationship exists between the price of a good and the quantity demanded.

Relative Price

The price of one good expressed in terms of another, calculated as the ratio of their nominal prices ($\text{Price}_A / \text{Price}_B$).

Third Law of Demand

The principle stating that adding a fixed per-unit cost or charge to two competing goods lowers the relative price of the higher-quality option, increasing the relative consumption of high-quality goods.

Marginal Value

The maximum price or amount of another good an individual is willing to pay or sacrifice to obtain one additional unit of a commodity.

Total Value

The maximum total amount a consumer is willing to pay for a given total quantity of a good, represented graphically by the area under the demand curve.

Market Equilibrium

The market state where quantity demanded equals quantity supplied ($Q_D = Q_S$), determining the market-clearing price.

Surplus

A market condition occurring when the quantity supplied exceeds the quantity demanded ($Q_S > Q_D$), causing downward pressure on price toward equilibrium.