Unit 1 Foundations: How Societies Allocate Resources

Scarcity

The basic economic problem that resources are limited while human wants are essentially unlimited, forcing societies to make choices.

Economic System

The set of institutions and rules a society uses to decide what to produce, how to produce it, and for whom it will be produced.

Three Fundamental Economic Questions

The core allocation questions every economy must answer: (1) What to produce? (2) How to produce? (3) For whom to produce?

Market Economy

An economy where most allocation decisions are made by private individuals and firms interacting in markets, guided by supply, demand, and prices.

Price System

The market mechanism where prices adjust based on supply and demand to transmit information, create incentives, and ration scarce goods.

Command Economy

An economy where a central authority (often the government) makes key decisions about production, resource allocation, and distribution rules rather than relying primarily on market prices.

Information Problem

The challenge in command systems of collecting and processing enough accurate, up-to-date information to allocate resources efficiently; muted or distorted price signals can lead to persistent shortages or surpluses.

Mixed Economy

An economy that combines market allocation for many goods with significant government roles such as providing public goods, regulating, redistributing income, and correcting market failures.

Market Failure

A situation where market outcomes are inefficient (e.g., due to externalities, public goods, or market power), so markets do not allocate resources in a socially optimal way.

Externality

A cost or benefit from an economic decision that falls on third parties and is not reflected in market prices, which can cause inefficient outcomes.

Public Good

A good (e.g., national defense) associated with market failure because it is nonrival in consumption and difficult to exclude people from using.

Market Power

The ability of a firm or group of firms to influence market prices or output, which can make market outcomes inefficient.

Voluntary Exchange

A trade that occurs willingly because both parties expect to be better off (higher utility or profit) after the exchange.

Gains from Trade

The mutual benefits that buyers and sellers (or trading partners) expect from voluntary exchange.

Comparative Advantage

The idea that specialization and trade can benefit parties when they focus on activities they do at lower opportunity cost, even if one party is better at producing everything.

Property Rights

Legally enforced rules specifying ownership, allowable use, exclusion (who can be prevented from using an asset), and transferability (whether/how it can be sold or given away).

Incentive

Any factor that motivates a person or firm to act in a certain way; incentives affect behavior because choices involve trade-offs.

Positive Incentive

A reward that encourages an action, such as profits, wages, or tax credits.

Negative Incentive

A penalty or added cost that discourages an action, such as fines, higher costs, or lost revenue.

Common Resource

A resource that is rival in consumption (one person’s use reduces what’s available for others) but difficult to exclude people from using.

Tragedy of the Commons

The overuse and depletion of a common resource because individuals have incentives to extract as much as possible when exclusion is weak and benefits are private while costs are shared.

Marginal Analysis

A decision-making approach that compares marginal benefit and marginal cost to decide whether to do a little more or a little less of an activity.

Marginal Benefit (MB)

The additional benefit gained from doing one more unit of an activity.

Marginal Cost (MC)

The additional cost incurred from doing one more unit of an activity.

Marginal Decision Rule (MB = MC)

The optimal stopping point occurs where marginal benefit equals marginal cost; if MB > MC, do more, and if MB < MC, do less.