Markets — Edexcel A-Level Business
Test yourself on Markets with PEARSON EDEXCEL A-Level practice questions.
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Markets explained
Where the two curves cross the market clears, and that price does three jobs at once: it rations scarce output to those willing to pay, it signals to producers where resources should go, and it gives them the incentive to supply more.
Read the full explanation
Below that level there is a shortage and buyers bid the price up; above it there is a surplus cleared by discounting, which is why unsold summer stock ends up in a sale rail. Businesses use this to set prices, plan capacity and decide whether to enter a market at all. The limitation worth arguing is that few real markets adjust so neatly, because branded firms are price makers, contracts and menu costs make prices sticky, and regulation or long lead times delay the response.
b) The drawing and interpretation of supply and demand diagrams to show the causes and consequences of price changes
A market diagram earns marks only when it is built properly and then read out loud: price on the vertical axis, quantity on the horizontal, both curves labelled, the original equilibrium marked, one curve moved in the direction the case justifies, and the new price and quantity marked clearly. Only the curve whose conditions changed should move, and a change in the good own price moves neither, it merely slides the market along. Reading it is where the analysis marks live, so say what happens to price and to quantity together, then convert that into what it means for the named business, whether higher revenue, a squeezed margin, idle capacity or the risk of running out of stock.
Your focus
- a) The interaction of supply and demand
- b) The drawing and interpretation of supply and demand diagrams to show the causes and consequences of price changes
Markets exam tips
Marking Points
- Defining equilibrium as the price at which quantity demanded equals quantity supplied, and identifying excess demand or excess supply when price sits away from it.
- Explaining the adjustment in steps, so a shortage puts upward pressure on price, which chokes off some demand and draws out more supply until the market clears.
- Applying the rationing, signalling and incentive functions of price to the named market rather than stating them in the abstract.
- Judging how quickly the market in the case can really adjust, given capacity, fixed contracts and lead times.
- Labelling fully, so axes, both curves before and after, and both equilibrium points, since an unlabelled sketch cannot be credited.
- Moving the correct curve in the correct direction and justifying that move with a determinant taken from the case.
- Stating the effect on equilibrium price and equilibrium quantity together rather than on price alone.
- Translating the new equilibrium into a business consequence such as revenue, contribution or capacity utilisation, which is actual output divided by maximum possible output as a percentage.
Examiner Tips
- 💡Expect this as the knowledge under a diagram question or as a chain of analysis inside a longer question on pricing or capacity.
- 💡Always finish the chain at the business, naming the effect on revenue, margin or capacity utilisation, because the paper rewards business consequence rather than economics for its own sake.
- 💡The strongest evaluation point is usually that adjustment takes time and that the firm holds some pricing power meanwhile.
- 💡Diagrams appear in both papers as support, and a small ruled sketch with full labels takes a minute and anchors an entire paragraph.
- 💡Write the sentence that reads the sketch, so price rises from the old level to the new while quantity falls, therefore the revenue effect depends on price elasticity of demand.
- 💡If the command is explain, the sketch plus a short chain is enough; if it is assess, the sketch is only evidence and the judgement must still be made.
Common Mistakes
- Saying a shortage causes demand to rise, when the shortage causes price to rise and quantity demanded to fall.
- Assuming the business is a price taker when the case describes a strong brand that clearly sets its own price.
- Drawing conclusions about revenue from the price movement alone while ignoring what happens to quantity.
- Moving both curves at once when only one condition has changed, which leaves the effect on quantity indeterminate and the argument unclear.
- Drawing a movement along a curve when the trigger was an income change, an advertising campaign or a rise in input costs.
- Producing a neat sketch and never referring to it in the prose, so it decorates the page instead of carrying the argument.