This chapter introduces the basic concepts of economics, highlighting the importance of understanding how societies fulfill their needs using limited resources.
Introduction – Formula & Equation Sheet
Essential formulas and equations from Introductory Microeconomics, tailored for Class 12 in Economics.
This one-pager compiles key formulas and equations from the Introduction chapter of Introductory Microeconomics. Ideal for exam prep, quick reference, and solving time-bound numerical problems accurately.
Key concepts & formulas
Essential formulas, key terms, and important concepts for quick reference and revision.
Formulas
Opportunity Cost = What is given up / What is gained
Opportunity cost refers to the loss of potential gain from other alternatives when one alternative is chosen. It helps in understanding the true cost of decisions in resource allocation.
Production Possibility Frontier (PPF)
The PPF represents the maximum combinations of two goods that can be produced using available resources efficiently. Points on the curve indicate efficient production levels.
Scarcity = (Unlimited Wants - Limited Resources)
Scarcity occurs when resources are insufficient to satisfy all wants. It necessitates choice and trade-offs in economic decision-making.
Total Production = Sum of individual productions
This formula expresses that total output in an economy is the aggregate of all individual outputs produced by economic agents.
Allocation of Resources = Resources used in production
This defines how resources such as labor, capital, and land are distributed among various uses in the economy’s production process.
Aggregate Supply = Total supply of goods and services
This represents the total supply of goods and services produced within an economy at a given overall price level in a specified time period.
Aggregate Demand = Total demand for goods and services
This is the total demand for final goods and services in an economy at various price levels in a specified period.
Equilibrium Price = Where Demand = Supply
This is the price at which the quantity of a good demanded by consumers equals the quantity supplied by producers.
Net Social Welfare = Total social benefits - Total social costs
This balances the social benefits received against the societal costs incurred, aiding in evaluating economic efficiency and policy decisions.
Investment Goods = Goods used to produce other goods
Investment goods increase future production possibilities, enhancing an economy's capacity to produce consumer goods.
Equations
Production Possibility Frontier (PPF): Qx + Qy ≤ Resources
This equation indicates that the sum of quantities of goods X and Y produced is limited by the available resources in the economy.
Opportunity Cost (unit of good X) = ΔQy / ΔQx
This represents the loss in quantity of good Y divided by the gain in quantity of good X when resources are reallocated.
Demand Function: Qd = f(P, income, preferences)
This function expresses the quantity demanded as a function of the price of the good, consumer income, and personal preferences.
Supply Function: Qs = f(P, production costs)
This function shows the quantity supplied based on the price of the good and the costs associated with production.
Elasticity of Demand = % change in quantity demanded / % change in price
This measures the responsiveness of the quantity demanded to a change in price, indicating consumer sensitivity.
Total Revenue = Price × Quantity Sold
This represents the total income a firm receives from selling its goods or services, helping to analyze firm performance.
Marginal Cost = ΔTotal Cost / ΔQuantity
This shows the increase in total cost resulting from producing one additional unit of a good, crucial for decision-making.
Marginal Utility = ΔTotal Utility / ΔQuantity
This measures the additional satisfaction gained from consuming one more unit of a good, aiding in consumer choice.
Economic Profits = Total Revenues - Total Costs
This formula calculates the profit earned after all costs, including opportunity costs, have been deducted.
Social Welfare = Consumer Surplus + Producer Surplus
This represents the overall benefit to society, combining the surplus enjoyed by consumers and producers in a market.
This chapter explores how individual consumers make choices about what goods to buy based on their preferences and income constraints.
Start chapterThis chapter discusses the process of production in firms, examining how inputs are transformed into outputs and the associated costs. Understanding this is essential for analyzing firm behavior and market dynamics.
Start chapterThis chapter discusses how firms operate under perfect competition, focusing on profit maximization and supply curves.
Start chapterThis chapter explains how market equilibrium is achieved through demand and supply analysis. Understanding this concept helps in analyzing price determination and market dynamics.
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