A Level H2 Economics Practice Paper 2

TuitionGoWhere Practice Paper — Economics H2 A-Level (Version 2) Answer Key

Total Marks: 60

Section A: Market Mechanism and Elasticity (21 marks)

Q1 [2 marks]

• Signalling function: Prices act as signals to both consumers and producers about relative scarcity. (1 mark)
• A rise in price signals scarcity/profit opportunity, incentivising producers to increase supply and consumers to reduce demand. (1 mark) Teaching note: The price mechanism coordinates without central planning. Students often confuse signalling with rationing — signalling is about information, rationing is about allocation under shortage.

Q2 [3 marks] Midpoint formula: %ΔQ = (80–100)/((80+100)/2) = –20/90 = –22.22%; %ΔP = (5–4)/4.5 = 1/4.5 = 22.22%. PED = –22.22 / 22.22 = –1.0 (absolute value 1.0, unit elastic). (3 marks: 1 for Q change, 1 for P change, 1 for final) Common mistake: Using simple % (100→80 = –20%) without midpoint gives –1.0 here by chance but fails at other values.

Q3 [3 marks]

• Premium rice YED = –4% / 10% = –0.4 → inferior good (demand falls as income rises). (1.5 marks)
• Staple rice YED = +2% / 10% = +0.2 → normal good. (1.5 marks) Note: Negative YED defines inferior; positive defines normal. Premium rice is inferior in this context.

Q4 [2 marks]

• XED = %ΔQd of good A / %ΔP of good B. (1 mark)
• For substitutes, XED > 0 (positive sign). (1 mark)

Q5 [2 marks]

• %ΔQd = PED × %ΔP = 0.4 × (–10%) = –4% (demand falls 4%). (1 mark)
• %ΔQs = PES × %ΔP = 1.2 × (–10%) = –12% (supply falls 12%). (1 mark) Supply responds more strongly due to higher elasticity.

Q6 [3 marks]

• Diagram shows D vertical? No: D downward sloping, S1 left to S2. (1 mark)
• New equilibrium E2: P↑, Q↓. (1 mark)
• Lithium is input; battery market supply falls, price rises, quantity falls. (1 mark) Expected visual: Leftward S shift, label P2> P1, Q2< Q1.

Q7 [3 marks]

• When price below equilibrium → excess demand (shortage). (1)
• Rising price rations goods to those willing/able to pay, quantity supplied rises. (1)
• Market reaches equilibrium, no persistent shortage without intervention. (1)

Section B: Government Intervention (18 marks)

Q8 [3 marks]

• Max price: legal ceiling below eq price (e.g. rent control). (1.5)
• Min price: legal floor above eq price (e.g. minimum wage). (1.5)

Q9 [3 marks]

• Supply shifts up by $2 (S to S+tax). (1)
• New eq: Q↓, Pc (consumer) > P0, Pp (producer) < P0. (2) Visual: parallel shift, burden shared.

Q10 [3 marks]

• Inelastic demand: consumers bear more subsidy benefit as price drop small but Q unchanged much. (1.5)
• Elastic demand: larger Q response, producers receive more effective support. (1.5)

Q11 [3 marks]

• Shortage (excess demand) as Qd > Qs at ceiling. (1.5)
• Unintended: black market, deterioration of quality. (1.5)

Q12 [3 marks]

• Initial CE = 10×50 = $500; New CE = 8×70 =$560. Rise of $60. (2)
• Outlay rose when price fell → demand inelastic (revenue inverse to price). (1)

Q13 [3 marks]

• Quota limits imports, helps domestic producers, may raise price. (1)
• Consumers face higher price, less choice → welfare may fall. (1)
• Not necessarily improvement; depends on externalities/infant industry. (1)

Section C: Firms and Market Structures (21 marks)

Q14 [3 marks]

• Condition: MR = MC. (1)
• MC rising ensures max not min profit (if MC falling, expanding raises profit). (2)

Q15 [2 marks]

• Advertising, branding, product differentiation. (1)
• Not price cuts, to build loyalty. (1)

Q16 [4 marks]

• High share 65% suggests dominance. (1)
• Exclusive contracts, barriers = monopoly power signs. (1.5)
• But contestable? Brand loyalty high → real power. (1.5) Descriptor: Identify 2+ features, evaluate context.

Q17 [4 marks] At P=14, Q = (30–14)/0.4 = 40. dQ/dP = –2.5. PED = –2.5 × (14/40) = –0.875. |PED|<1 inelastic. (3) Do NOT cut price; revenue falls. (1)

Q18 [3 marks]

• PC: Pc=MC, Qc. Monopoly: MR=MC, Qm<Qc, Pm>Pc. (3) Visual: show MR, restricted output.

Q19 [3 marks]

• Satisficing: managers meet acceptable profit, avoid risk. (1)
• Large firms: separation ownership/management → realistic. (2)

Q20 [3 marks]

• Cinema charges different groups; fills seats, may raise producer surplus. (1)
• If allocative efficiency improves (empty seats used) welfare up. (1)
• But consumer surplus transfer; net ambiguous. (1)