Microeconomics and Markets

Year 1 / ASYear 2 / A-Level All Boards (AQA, Edexcel, OCR, WJEC, CCEA) AQA

A-Level Economics revision: Microeconomics and Markets. Learning objectives, key points, worked examples and practice questions across AQA, Edexcel, OCR, WJEC and CCEA.

Exam Board:

📌 Key Points

Key Fact: Demand: P↓->Qd↑ (law); Determinants: income, tastes, related goods, expectations, #buyers

Key Fact: Supply: P↑->Qs↑; Determinants: input prices, technology, expectations, #sellers, taxes/subsidies

Key Fact: Equilibrium: Qd=Qs; Shortage: P<P* -> Qd>Qs; Surplus: P>P* -> Qs>Qd

Key Fact: PED = %DeltaQd/%DeltaP; elastic (>1), inelastic (<1), unitary (=1); factors: substitutes, necessity, time, %income

Key Fact: YED: normal (>0), inferior (<0); XED: substitutes (>0), complements (<0); PES: time, spare capacity

Key Fact: Surplus: CS = area under D above P; PS = area above S below P; Deadweight loss from intervention

Key Fact: Market structures: PC (many, homogeneous, free entry); Monopoly (one, barriers); MC (many, differentiated); Oligopoly (few, interdependence)

Key Fact: Labour: D = MRP; S = workers; Wage = MRP = MRC in PC; Monopsony: MRC > S; Unions: collective bargaining

🎯 Learning Objectives

Analyse demand and supply: shifts vs movements, determinants
Determine market equilibrium and disequilibrium (excess demand/supply)
Calculate and interpret elasticities: PED, YED, XED, PES
Understand consumer and producer surplus, allocative efficiency
Evaluate market structures: perfect competition, monopoly, monopolistic competition, oligopoly
Analyse labour markets: derived demand, MRP, wage determination, trade unions
Evaluate government intervention: max/min prices, taxes, subsidies, regulation

💡 Worked Example

Exam-Style Question

Question: A monopolist faces demand P = 100 - 2Q and has MC = 20. Find profit-maximising output, price, and profit

Model Answer:

MR = 100 - 4Q. Set MR = MC: 100 - 4Q = 20 -> Q = 20. P = 100 - 2(20) = 60. Profit = (P - ATC)Q. ATC = TC/Q. If TC = 20Q + 100, ATC = 20 + 5 = 25. Profit = (60-25)x20 = 700

❓ Practice Questions

Questions:

If PED = -0.5 and price rises 10%, %DeltaQd?
Explain why monopolies produce less than PC
Calculate CS at P=50, Q=100 for linear demand P=100-Q
Evaluate minimum wage using monopsony model
Why is PES more elastic in long run?

🎬 Video Resources

Microeconomics and Markets - Overview -- YouTube Search
Microeconomics and Markets - Exam Questions -- YouTube Search

📄 Past Papers & Exam Resources

🔗 Further Reading & Resources

Physics & Maths Tutor - Microeconomics and Markets -- Free notes, worksheets, and past paper questions by topic
Dr Frost Maths - Microeconomics and Markets -- Free resources, slides, and interactive questions
BBC Bitesize - Microeconomics and Markets -- BBC Bitesize revision resources

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