This chapter explains how market equilibrium is achieved through demand and supply analysis. Understanding this concept helps in analyzing price determination and market dynamics.
Market Equilibrium - Quick Look Revision Guide
Your 1-page summary of the most exam-relevant takeaways from Introductory Microeconomics.
This compact guide covers 20 must-know concepts from Market Equilibrium aligned with Class 12 preparation for Economics. Ideal for last-minute revision or daily review.
Complete study summary
Essential formulas, key terms, and important concepts for quick reference and revision.
Key Points
Definition of Market Equilibrium.
Market equilibrium occurs when the quantity demanded equals quantity supplied at a specific price.
Equilibrium Price and Quantity.
Equilibrium price is denoted by p*, and equilibrium quantity by q*. Found where DD intersects SS curve.
Excess Demand Explained.
Exists when demand exceeds supply at a given price. Leads to upward pressure on prices.
Excess Supply Explained.
Occurs when supply surpasses demand at a price. Results in downward pressure on prices.
Invisible Hand Concept.
Describes self-regulating nature of markets, adjusting prices based on excess demand or supply.
Demand Curve Shifts.
Rightward shift indicates increased demand; equilibrium price and quantity rise. Leftward shifts decrease both.
Supply Curve Shifts.
Rightward shifts signal increased supply; equilibrium price drops, quantity rises. Leftward shifts have opposite effects.
Free Entry and Exit in Firms.
In a competitive market, firms enter when profits are high and exit when they incur losses, stabilizing prices.
Price Ceiling Impact.
A maximum price set below equilibrium creates excess demand and potential shortages in the market.
Price Floor Impact.
A minimum price set above equilibrium leads to excess supply; firms may struggle to sell their output.
Marginal Revenue Product of Labour.
Wage equals the value of the marginal product of labour. Firms hire until w = MRP of labour.
Equilibrium in Labour Market.
Determined at intersection of labour demand and supply curves. Wage adjusts based on demand-supply balance.
Simultaneous Shifts of Demand and Supply.
Can occur in four combinations, impacting equilibrium quantity and price differently based on shift magnitude.
Normal and Inferior Goods.
Normal goods see increased demand with higher income; inferior goods see decreased demand under the same condition.
Market Supply Curve Definition.
Represents total output firms will produce at varying prices, influenced by production costs.
Marginal Cost and Average Cost.
Marginal cost is the additional cost of producing one more unit; average cost is total cost per unit produced.
Factors Affecting Demand.
Includes consumer preferences, income, prices of related goods, and expectations about future prices.
Factors Affecting Supply.
Includes production costs, technological advancements, and number of suppliers in the market.
Example of Equilibrium Price Calculation.
For demand qD = 200 - p, supply qS = 120 + p, set qD = qS to find equilibrium price and quantity.
Demand Shift and Income Effect.
Consumer income increases can shift demand right for normal goods, affecting equilibrium price and quantity.
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