Macroeconomics vs Microeconomics

Gross Domestic Product (GDP)

The total monetary value of all finished goods and services produced within a country's borders in a specific time period. It is the broadest quantitative measure of a nation's total economic activity and serves as the primary scorecard for an economy's health.

Inflation

A sustained increase in the general price level of goods and services in an economy over a period of time. When the price level rises, each unit of currency buys fewer goods and services, eroding purchasing power.

Unemployment Rate

The percentage of the labor force that is jobless and actively seeking employment. It is a key indicator of labor market health and has several types: frictional (job transitions), structural (skills mismatch), and cyclical (demand shortfalls).

Monetary Policy

Actions taken by a central bank to manage the money supply and interest rates to achieve macroeconomic objectives like controlling inflation, managing unemployment, and stabilizing the currency.

Fiscal Policy

The use of government spending and taxation to influence the economy. Expansionary fiscal policy increases spending or cuts taxes to stimulate growth, while contractionary fiscal policy does the opposite to cool an overheating economy.

Supply and Demand

The foundational model of microeconomics describing how the price and quantity of a good are determined by the interaction of buyers (demand) and sellers (supply) in a market. Equilibrium occurs where the quantity demanded equals the quantity supplied.

Elasticity

A measure of how responsive the quantity demanded or supplied of a good is to a change in one of its determinants, such as price, income, or the price of related goods. Elastic goods show large quantity changes; inelastic goods show small changes.

Opportunity Cost

The value of the next best alternative forgone when making a choice. Every decision involves a trade-off, and the true cost of any action includes what you give up by not choosing the best alternative.

Marginal Analysis

A decision-making framework that evaluates the additional (marginal) benefit versus the additional (marginal) cost of one more unit of an activity. Rational agents continue an activity as long as marginal benefit exceeds marginal cost.

Market Structures

The classification of markets based on the number of firms, product differentiation, barriers to entry, and pricing power. The four main structures are perfect competition, monopolistic competition, oligopoly, and monopoly.