John Maynard Keynes: A British economist whose theories advocated for government intervention in times of economic downturns, known as Keynesian economics.
Supply and Demand: The fundamental principle that determines prices in a market economy. It explains how the quantity of a good or service demanded by buyers relates to its price and availability.
Gross Domestic Product (GDP): A measure of a country's total economic output within a specific time period, often used as an indicator of economic health.