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External Influences

Equilibrium, shortages and surpluses

  • 2 things to know
  • Components 01, 02 and 03

Overview

Recall questions on market equilibrium, how the price mechanism clears surpluses, excess demand and shortages, the effect of shifts in demand and supply on equilibrium price and quantity, buffer stock, responses to persistent excess demand, heavy discounting, underpriced concert tickets, and why markets rarely rest at equilibrium.

What you need to know

Answer each one before you reveal it.

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Process

How does the price mechanism remove a surplus from a market?

Key term

Why is a shortage of its own product not necessarily good news for a business?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is meant by market equilibrium?

    Model answer

    Equilibrium is the price at which the quantity consumers want to buy exactly equals the quantity producers want to sell, so there is no pressure on price to change.

  2. 2

    How does the price mechanism remove a surplus from a market?

    Model answer

    Unsold stock builds up, so firms cut the price, which persuades consumers to buy more and producers to offer less until the surplus disappears.

  3. 3

    What is excess demand, and how does it show itself in a shop?

    Model answer

    Excess demand is a shortage, where buyers want more than is being supplied at the current price, and it shows itself in sold-out shelves, waiting lists and queues.

  4. 4

    What happens to equilibrium price and quantity when demand shifts to the right and supply is unchanged?

    Model answer

    Both the equilibrium price and the equilibrium quantity rise.

  5. 5

    What happens to equilibrium price and quantity when supply shifts to the right and demand is unchanged?

    Model answer

    The equilibrium price falls and the equilibrium quantity rises.

  6. 6

    What happens to equilibrium price and quantity when supply shifts to the left and demand is unchanged?

    Model answer

    The equilibrium price rises and the equilibrium quantity falls.

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Introduction to Business
Business Objectives and Strategy
External Influences
Accounting and Finance

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Revenue the cost of sales.
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AHow much finance the business needs to raise.
BHow much personal risk the owner is willing to carry.
CHow much control they want to keep.

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Customer means the person who buys a product and pays for it.
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