Pearson Edexcel A Level Economics A (9EC0)

Complete Specification — A/A* Master Notes

Assessment

Paper 1 — Markets and Business Behaviour

Mainly:

• Theme 1
• Theme 3
• microeconomics

Paper 2 — The National and Global Economy

Mainly:

• Theme 2
• Theme 4
• macroeconomics

Paper 3 — Microeconomics and Macroeconomics

• synoptic
• Themes 1–4
• data response and extended evaluation

THEME 1 — INTRODUCTION TO MARKETS AND MARKET FAILURE

1.1 Nature of Economics

Scarcity

Finite resources vs unlimited wants.

Creates opportunity cost.

Positive vs Normative

Positive: testable.

Normative: value judgement.

Production Possibility Frontiers

Show:

• scarcity;
• opportunity cost;
• efficiency;
• growth.

Outward shift: productive potential rises.

1.2 How Markets Work

Demand

Factors:

• income;
• preferences;
• substitutes/complements;
• expectations;
• population.

Supply

Factors:

• production cost;
• taxes;
• subsidies;
• productivity;
• technology.

Equilibrium

Intersection of supply/demand.

Disequilibrium creates pressure on price.

Consumer and Producer Surplus

Consumer surplus: willingness to pay minus market price.

Producer surplus: market price minus minimum acceptable price.

Useful for welfare analysis.

PED

[ PED=\frac{%\Delta Q_d}{%\Delta P} ]

Factors:

• substitutes;
• necessity;
• income share;
• time.

Revenue implications depend on elasticity.

YED

[ YED=\frac{%\Delta Q_d}{%\Delta Income} ]

XED

[ XED=\frac{%\Delta Q_d(A)}{%\Delta P(B)} ]

PES

[ PES=\frac{%\Delta Q_s}{%\Delta P} ]

Real-world examples

• cigarettes: relatively inelastic demand in many contexts;
• airline leisure tickets: generally more price-sensitive than essential transport;
• housing: relatively inelastic supply in short run.

1.3 Market Failure

Market failure: free market produces inefficient resource allocation.

Externalities

Negative: MSC > MPC or MSB < MPB.

Positive: MSB > MPB.

Public Goods

• non-rival;
• non-excludable.

Information Gaps

Consumers/producers lack adequate knowledge.

Moral Hazard

One party takes more risk because another bears cost.

Adverse Selection

Information asymmetry causes high-risk/low-quality participants to dominate.

Government Intervention

• tax;
• subsidy;
• regulation;
• tradable permits;
• state provision;
• information;
• behavioural policies.

Government Failure

Intervention may create net welfare loss due:

• information;
• unintended incentives;
• bureaucracy;
• regulatory capture.

A*: compare scale of market failure with scale of likely intervention failure.

THEME 2 — UK ECONOMY: PERFORMANCE AND POLICIES

2.1 Measures of Economic Performance

Growth

Real GDP growth.

GDP per capita gives stronger indication of average material output per person.

Limitations:

• inequality;
• informal economy;
• environment;
• leisure;
• quality.

Inflation

CPI/RPI-style price indices.

Causes:

• demand-pull;
• cost-push;
• expectations.

Unemployment

Types:

• cyclical;
• structural;
• frictional;
• seasonal.

Balance of Payments

Current account includes:

• goods;
• services;
• primary income;
• secondary income.

2.2 Aggregate Demand

[ AD=C+I+G+(X-M) ]

Consumption:

• disposable income;
• wealth;
• rates;
• confidence.

Investment:

• rates;
• confidence;
• expected profitability;
• capacity utilisation.

Government spending: fiscal policy.

Net trade: exchange rate/world demand.

2.3 Aggregate Supply

SRAS

Affected by:

• wages;
• energy;
• taxes;
• exchange rate.

LRAS

Affected by:

• labour;
• capital;
• productivity;
• enterprise;
• technology.

2.4 Economic Growth

Actual vs potential growth.

Benefits:

• living standards;
• jobs;
• tax revenue.

Costs:

• inequality;
• environmental damage;
• inflation;
• current account pressure.

2.5 Macroeconomic Objectives and Policies

Objectives:

• growth;
• employment;
• inflation control;
• current account;
• redistribution;
• fiscal stability.

Conflicts: growth vs inflation; growth vs environment; low unemployment vs inflation.

Monetary Policy

Interest rates affect:

• consumption;
• investment;
• exchange rate;
• asset prices.

QE: asset purchases aimed at reducing yields and supporting spending.

Limitations:

• weak transmission;
• time lags;
• distribution effects.

Fiscal Policy

Expansionary: G↑ or T↓.

Contractionary: G↓ or T↑.

Automatic stabilisers: tax and welfare respond automatically.

Multiplier

[ Multiplier=\frac{1}{1-MPC} ] in simplified model.

Actual multiplier depends on:

• saving;
• tax;
• imports;
• spare capacity.

Supply-Side Policy

Market-based:

• tax;
• deregulation;
• competition;
• labour flexibility.

Interventionist:

• education;
• infrastructure;
• industrial policy;
• childcare;
• R&D.

A*: long time lags often matter more than theoretical effect.

THEME 3 — BUSINESS BEHAVIOUR AND LABOUR MARKET

3.1 Business Growth

Why firms grow:

• profit;
• market share;
• economies of scale;
• market power.

Organic vs inorganic.

Horizontal, vertical and conglomerate integration.

3.2 Business Objectives

Objectives may include:

• profit maximisation;
• revenue maximisation;
• sales maximisation;
• satisficing;
• survival.

Principal-agent problem: managers may pursue objectives different from shareholders.

3.3 Revenue, Costs and Profit

[ TR=P\times Q ]

[ AR=TR/Q ]

[ MR=\Delta TR/\Delta Q ]

[ TC=TFC+TVC ]

[ AC=TC/Q ]

[ MC=\Delta TC/\Delta Q ]

Profit max: [ MC=MR ]

Economies/Diseconomies of Scale

Economies:

• purchasing;
• technical;
• managerial;
• financial;
• marketing.

Diseconomies:

• communication;
• bureaucracy;
• coordination.

3.4 Market Structures

Perfect Competition

• many firms;
• identical products;
• low barriers;
• price takers.

Long-run normal profit.

Monopolistic Competition

• many firms;
• differentiated;
• low barriers.

Oligopoly

• interdependence;
• barriers;
• concentration.

Game theory: prisoner's dilemma.

Monopoly

market power from:

• barriers;
• scale;
• patents;
• network effects.

Potential welfare loss: P > MC.

But: innovation/dynamic efficiency possible.

Real-world application

Digital platform markets often exhibit network effects and high switching/data advantages, helping explain persistent market power.

Price Discrimination

Conditions:

• market power;
• ability to segment;
• prevent resale.

Degrees:

• first;
• second;
• third.

Example: airlines use complex segmentation based on booking timing, flexibility and customer type.

Contestability

Even concentrated markets may behave competitively if entry/exit is easy and sunk costs low.

3.5 Labour Market

Demand for labour: derived.

[ MRP=MPP\times MR ]

Wages determined by labour demand/supply.

Influences:

• skill;
• education;
• monopsony;
• unions;
• discrimination;
• migration.

Minimum Wage

Possible employment loss in competitive model.

In monopsony: minimum wage can raise wages and employment over a range.

THEME 4 — GLOBAL PERSPECTIVE

4.1 International Economics

Globalisation

Drivers:

• trade liberalisation;
• TNCs;
• ICT;
• transport;
• financial flows.

Benefits:

• specialisation;
• scale;
• lower prices;
• FDI.

Costs:

• structural unemployment;
• tax competition;
• environmental externalities;
• supply-chain risk.

Comparative Advantage

Trade based on lower opportunity cost.

A* evaluation: assumptions include:

• factor mobility domestically;
• low transport costs;
• no strategic concerns;
• manageable distributional effects.

Trade Protection

Methods:

• tariffs;
• quotas;
• subsidies;
• regulation.

Arguments:

• infant industry;
• employment;
• national security;
• anti-dumping.

Costs:

• higher prices;
• retaliation;
• inefficiency.

Exchange Rates

Appreciation:

• cheaper imports;
• exports less competitive;
• lower imported inflation.

Depreciation: opposite.

Marshall-Lerner

Depreciation improves current account if sum of PED exports + PED imports >1.

J-Curve

Current account may initially worsen after depreciation because quantities adjust slowly.

4.2 Poverty and Inequality

Absolute vs relative poverty.

Measures:

• Lorenz curve;
• Gini coefficient.

Causes:

• labour-market differences;
• education;
• inheritance;
• discrimination;
• unemployment.

Policies:

• tax/benefits;
• education;
• minimum wage;
• wealth taxes.

4.3 Emerging and Developing Economies

Factors affecting growth/development:

• institutions;
• human capital;
• infrastructure;
• savings;
• FDI;
• trade;
• corruption;
• debt;
• demographics.

Development measures:

• HDI;
• GDP per capita;
• health;
• education.

4.4 Financial Sector

Functions:

• intermediation;
• liquidity;
• risk;
• payment systems.

Market Failure in Finance

• asymmetric information;
• moral hazard;
• systemic risk.

Central Bank

• rates;
• lender of last resort;
• financial stability.

Real-world example — 2008 crisis

A strong application for systemic risk, credit contraction and intervention.

4.5 Role of State in Macroeconomy

Debates:

• free market vs intervention;
• austerity vs stimulus;
• industrial policy;
• redistribution;
• regulation.

A*: policy effectiveness depends on:

• state of cycle;
• inflation;
• debt;
• credibility;
• supply constraints.

EDEXCEL DIAGRAM MASTER LIST

• PPF
• supply/demand
• consumer/producer surplus
• indirect tax
• subsidy
• price controls
• externalities
• monopoly
• perfect competition
• oligopoly/kinked demand where taught
• labour market
• monopsony
• minimum wage
• AD/AS
• LRAS
• Phillips curve
• currency market
• tariff

EDEXCEL EVALUATION FRAMEWORK

Use MATES:

M — Magnitude

How large is effect?

A — Assumptions

Which assumption could fail?

T — Time

Short vs long run?

E — Elasticity

Does responsiveness alter result?

S — State/Stakeholders

What is current macro state or who is affected?

REAL-WORLD EXAMPLE BANK

EDEXCEL 25-MARK ESSAY METHOD

1. define key concept;
2. first KAA chain + diagram;
3. targeted evaluation;
4. second KAA chain;
5. evaluation;
6. final judgement.

Judgement:

“Overall, policy X is likely to be more effective than Y in the long run because…, although if the economy is operating with substantial spare capacity the short-run ranking could reverse.”

COMMON LOST MARKS

• no diagram labels;
• shift/movement confusion;
• profit maximisation not shown at MC=MR;
• monopoly = one firm only;
• normal profit called zero accounting profit;
• current account confused with government budget;
• depreciation/import effects reversed;
• tariff diagram incorrect;
• globalisation described only as more trade;
• inequality and poverty treated as synonyms;
• evaluation unrelated to exact question.