AQA A-Level Economics 7136

Complete Specification — A/A* Master Notes

A rule:* Economics answers must combine accurate theory + correctly labelled diagrams + chains of analysis + contextual application + evaluation based on assumptions, magnitude, time period and stakeholder effects.

Real-world rule: Use examples to prove an economic mechanism, not to decorate an answer. Date-sensitive statistics should live in separate updateable evidence blocks.

Assessment

Paper 1 — Markets and Market Failure

• microeconomics
• 2 hours
• 80 marks
• 33.3%

Paper 2 — National and International Economy

• macroeconomics
• 2 hours
• 80 marks
• 33.3%

Paper 3 — Economic Principles and Issues

• synoptic micro + macro
• 2 hours
• 80 marks
• 33.3%

At least 20% of A-level marks assess quantitative skills.

THE ECONOMIST'S A* TOOLKIT

Ceteris Paribus

Means:

all other relevant factors held constant.

Use when explaining cause/effect.

Positive Statement

Testable factual claim.

Normative Statement

Value judgement.

Marginal Analysis

Economic choices frequently depend on the additional benefit/cost of one more unit.

Short Run vs Long Run

Short run: at least one factor fixed.

Long run: all factors variable.

Static vs Dynamic Efficiency

Static: best use of resources now.

Dynamic: innovation/investment improving future efficiency.

QUANTITATIVE FORMULA BANK

Percentage change

[ %\Delta X=\frac{New-Old}{Old}\times100 ]

Price elasticity of demand

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

Income elasticity

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

Cross elasticity

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

Price elasticity of supply

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

Total revenue

[ TR=P\times Q ]

Average revenue

[ AR=\frac{TR}{Q} ]

Total cost

[ TC=TFC+TVC ]

Average cost

[ AC=\frac{TC}{Q} ]

Marginal cost

[ MC=\frac{\Delta TC}{\Delta Q} ]

Profit

[ \Pi=TR-TC ]

Labour productivity

[ Productivity=\frac{Output}{Workers\ or\ Hours} ]

Unemployment rate

[ \frac{Unemployed}{Labour\ Force}\times100 ]

Inflation rate

Percentage change in a price index.

GDP growth

[ \frac{Real\ GDP_t-Real\ GDP_{t-1}}{Real\ GDP_{t-1}}\times100 ]

Current account balance

Broadly: trade in goods/services + primary income + secondary income.

MICROECONOMICS

1. Economic Methodology and the Economic Problem

Scarcity

Unlimited wants + finite resources.

Creates:

• choice;
• opportunity cost;
• allocation problem.

Factors of Production

• land;
• labour;
• capital;
• enterprise.

Opportunity Cost

Value of next-best alternative forgone.

Example

If government spends £1bn on rail infrastructure, the opportunity cost is the best alternative use of that fiscal resource, such as healthcare, debt reduction or tax cuts.

Production Possibility Frontier

Shows maximum attainable combinations of two outputs given resources/technology.

Points

• on PPF = productively efficient;
• inside = unemployed/inefficient resources;
• outside = currently unattainable.

Outward Shift

Caused by:

• investment;
• productivity;
• education;
• technological progress;
• more resources.

A* Evaluation

Growth in productive capacity does not guarantee:

• actual GDP growth;
• improved welfare;
• equal distribution;
• environmental sustainability.

2. Individual Economic Decision Making

Rational Choice

Traditional model: consumers maximise utility.

Assumptions:

• information;
• consistency;
• calculation.

Behavioural Economics

Bounded Rationality

People have limited:

• information;
• time;
• computational ability.

Bounded Self-Control

People may choose against long-term interests.

Anchoring

Initial reference point affects choices.

Framing

Decision changes depending on presentation.

Social Norms

Behaviour influenced by others.

Nudge

Alter choice architecture while retaining choice.

Real-world example — pension auto-enrolment

Automatic enrolment is a classic nudge mechanism: default participation can increase pension saving because inertia/status quo bias affects behaviour.

Evaluation

Nudges:

• cheap;
• preserve freedom.

But:

• effects can be modest;
• firms/governments may exploit biases;
• structural incentives may matter more.

3. Price Determination in Competitive Markets

Demand

Law of demand: price rises → quantity demanded usually falls, ceteris paribus.

Reasons:

• substitution effect;
• income effect.

Demand Shifters

• income;
• tastes;
• population;
• expectations;
• prices of substitutes/complements.

Example — electric vehicles

Demand can rise when consumers expect lower running costs, charging infrastructure improves and environmental preferences strengthen.

Supply

Price rises → quantity supplied usually rises.

Supply shifters:

• costs;
• technology;
• tax;
• subsidies;
• weather;
• productivity;
• number of firms.

Equilibrium

Market-clearing equilibrium: [ Q_d=Q_s ]

Shortage: price below equilibrium.

Surplus: price above equilibrium.

Diagram Rule

Always:

• label axes;
• label original/new curves;
• show equilibrium price/quantity;
• explain direction.

PED

Elastic: [ |PED|>1 ]

Inelastic: [ |PED|<1 ]

Unit elastic: =1.

Determinants

• substitutes;
• necessity;
• proportion of income;
• time.

PED and Revenue

Elastic demand: price ↓ → TR ↑.

Inelastic demand: price ↑ → TR ↑.

Example — cigarettes

Demand may be relatively price inelastic in the short run due to addiction, though elasticity can be greater over longer periods and among younger consumers.

A*: PED varies by:

• consumer;
• geography;
• time;
• price range.

YED

Positive: normal good.

Negative: inferior.

High positive: luxury.

Example

Luxury international travel tends to be more income-sensitive than essential food.

XED

Positive: substitutes.

Negative: complements.

Magnitude measures strength.

Example

Tea and coffee may have positive XED; printers and compatible ink have negative XED.

PES

Elasticity of supply depends on:

• spare capacity;
• stocks;
• production time;
• factor mobility.

Example — housing

Housing supply is often relatively inelastic in the short run because planning, land assembly and construction take time.

Consumer and Producer Surplus

Consumer Surplus

Difference between willingness to pay and price.

Producer Surplus

Difference between market price and minimum acceptable price.

Use to evaluate:

• taxation;
• subsidies;
• price controls;
• trade.

4. Production, Costs and Revenue

Short Run

At least one factor fixed.

Law of Diminishing Returns

Adding variable input to fixed input eventually causes marginal product to fall.

This explains rising short-run marginal cost.

Economies of Scale

Internal:

• technical;
• purchasing;
• managerial;
• financial;
• marketing;
• risk-bearing.

Average cost falls as output rises.

Diseconomies

• bureaucracy;
• communication;
• coordination;
• weak motivation.

Example — supermarkets

Large supermarket chains can negotiate bulk purchasing discounts, but very large organisations can face coordination and management complexity.

Revenue

[ TR=P\times Q ]

[ AR=TR/Q ]

Under perfect competition: AR = MR = price.

For downward-sloping demand: MR lies below AR.

Profit

Normal profit: minimum reward needed to keep resources in current use.

Supernormal: revenue exceeds explicit + implicit opportunity costs.

Loss: TR below total economic costs.

5. Market Structures

Perfect Competition

Assumptions:

• many buyers/sellers;
• homogeneous product;
• perfect information;
• free entry/exit;
• firms price takers.

Long-run: normal profit.

Efficiency:

• allocative where P=MC;
• productive at minimum AC.

Limitation: real markets rarely meet assumptions.

Monopoly

AQA uses monopoly power rather than necessarily one firm = entire industry.

Sources:

• patents;
• brand;
• economies of scale;
• network effects;
• control of resources;
• regulation.

Monopoly Outcomes

Potential:

• higher price;
• lower output;
• supernormal profit;
• allocative inefficiency.

But monopoly profits can finance:

• R&D;
• innovation;
• economies of scale.

Real-world example — digital platforms

Network effects can create strong market power where users value a platform more as more users join.

Oligopoly

Features:

• few interdependent firms;
• barriers;
• strategic behaviour.

Concentration Ratio

Measures market share of largest firms.

Non-price Competition

• advertising;
• branding;
• service;
• innovation.

Collusion

Formal/implicit coordination.

Cartel: firms agree price/output.

Prisoner's Dilemma

Explains instability of collusion: individual incentive to cheat.

Monopolistic Competition

• many firms;
• differentiated products;
• low barriers.

Long run: normal profit due entry.

Contestable Markets

Threat of entry can discipline incumbent even with few firms.

Conditions:

• low sunk costs;
• easy entry/exit.

Efficiency

Productive

Lowest AC.

Allocative

P=MC.

Dynamic

innovation over time.

X-inefficiency

lack of competitive pressure raises costs.

A*: competition may improve static efficiency while market power may sometimes support dynamic investment.

Price Discrimination

Same product sold at different prices not explained by cost.

Conditions:

• market power;
• separate consumer groups;
• resale prevention;
• differing PED.

Example — airlines

Airlines price seats differently by booking timing, flexibility and customer segment.

Potential:

• increases profit;
• can expand output;
• transfers consumer surplus.

6. Labour Market

Demand for labour is derived demand.

Depends on:

• productivity;
• product demand;
• wage.

MRP

[ MRP=MPP\times MR ]

Profit-maximising employment: approximately where MRP = wage.

Wage Determination

Competitive labour market: intersection of labour demand and supply.

Supply affected by:

• qualifications;
• working conditions;
• migration;
• demographics.

Wage Differentials

Explain through:

• productivity;
• skill scarcity;
• compensating differentials;
• discrimination;
• monopsony;
• unions.

Monopsony

One/few dominant employers.

May pay wage below competitive equilibrium.

Trade Unions

Can raise wages through bargaining but effects depend on:

• union power;
• labour demand elasticity;
• productivity.

Minimum Wage

Potential:

• higher incomes;
• stronger incentives;
• productivity.

Risk:

• unemployment if wage above equilibrium.

But monopsony model shows minimum wage can raise both wages and employment up to a point.

7. Inequality and Poverty

Income vs Wealth

Income: flow.

Wealth: stock of assets.

Absolute Poverty

Income below minimum material threshold.

Relative Poverty

Income low relative to prevailing standard.

Causes

• low wages;
• unemployment;
• education;
• discrimination;
• inheritance;
• regional differences.

Lorenz Curve

Plots cumulative population against cumulative income/wealth.

Gini Coefficient

0 = equality. 1 = maximum inequality.

Policies

• progressive taxation;
• benefits;
• minimum wage;
• education;
• wealth/inheritance taxes.

A*: redistribution may reduce inequality but can create:

• incentive effects;
• fiscal cost;
• avoidance; depending on design.

8. Market Failure and Government Intervention

Externalities

Negative Production

MSC > MPC.

Example: industrial pollution.

Negative Consumption

MSB < MPB.

Example: smoking.

Positive Consumption

MSB > MPB.

Example: education/vaccination.

Positive Production

MSB or external benefit from production processes such as R&D spillovers.

Public Goods

Features:

• non-rival;
• non-excludable.

Free-rider problem leads underprovision.

Examples: national defence, flood-warning systems.

Information Failure

Consumers/producers lack full information.

Examples:

• financial products;
• health harms;
• education returns.

Merit and Demerit Goods

Merit: underconsumed due information/behavioural factors.

Demerit: overconsumed.

Government Intervention

Indirect Tax

Raises firms' costs; supply shifts left/up.

Burden depends on PED/PES.

Subsidy

Lowers production cost; supply shifts right.

Price Ceiling

Maximum legal price.

Can improve affordability but cause shortage.

Minimum Price

Can support producer income but create surplus.

Regulation

Rules/standards.

Information

Labelling/campaigns.

State Provision

Government directly supplies goods/services.

Government Failure

Intervention can worsen allocation due:

• information gaps;
• unintended incentives;
• regulatory capture;
• administrative cost;
• political objectives.

A*: Do not conclude intervention is bad simply because government failure exists. Compare likely market failure against intervention failure.

MACROECONOMICS

9. Macroeconomic Performance

Key objectives:

• economic growth;
• low/stable inflation;
• low unemployment;
• stable current account;
• sometimes environmental/fiscal stability.

Objectives can conflict.

GDP

Nominal GDP: current prices.

Real GDP: inflation-adjusted.

GDP per capita: output per person.

Limitations:

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

Economic Growth

Actual growth: real GDP increase.

Potential growth: rise in productive capacity.

Benefits:

• higher incomes;
• tax revenue;
• jobs.

Costs:

• inflation;
• inequality;
• environment;
• current-account pressure.

Unemployment

Types:

• cyclical;
• structural;
• frictional;
• seasonal;
• real-wage/classical.

Costs:

• lost output;
• fiscal cost;
• hysteresis;
• inequality.

Inflation

CPI measures consumer price change using weighted basket.

Demand-pull

AD grows faster than productive capacity.

Cost-push

Costs rise:

• wages;
• energy;
• imports.

Consequences

High/unexpected inflation:

• uncertainty;
• redistribution;
• competitiveness;
• menu costs.

Moderate inflation can ease real-wage adjustment.

10. Aggregate Demand and Aggregate Supply

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

Consumption

Affected by:

• income;
• confidence;
• wealth;
• rates;
• debt.

Investment

Affected by:

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

Government Spending

Direct component.

Net Exports

Affected by:

• exchange rates;
• world demand;
• relative inflation.

Short-Run AS

Can slope upward because higher output raises costs.

Long-Run AS

Represents productive potential.

Shifts from:

• productivity;
• labour;
• capital;
• technology;
• institutions.

AD/AS Analysis

Demand-side expansion: AD right:

• real output ↑;
• price level ↑ depending spare capacity.

Supply-side improvement: LRAS right:

• potential growth ↑;
• inflation pressure ↓.

A*: Effect depends on starting position and elasticity of AS.

11. Fiscal Policy

Government spending and taxation.

Expansionary

G ↑ / T ↓.

Can raise AD.

Contractionary

G ↓ / T ↑.

Can reduce inflation/borrowing.

Automatic Stabilisers

Tax receipts and welfare vary automatically with cycle.

Budget Deficit

Spending > revenue.

National Debt

Accumulated borrowing.

A*: Debt sustainability depends on:

• interest rates;
• growth;
• maturity;
• investor confidence;
• purpose of borrowing.

12. Monetary Policy

Interest rates and other monetary tools.

Lower rates:

• consumption ↑;
• investment ↑;
• exchange rate may weaken;
• AD ↑.

Transmission is uncertain.

Quantitative Easing

Central bank creates reserves to purchase assets.

Potential:

• lower yields;
• higher asset prices;
• more spending/investment.

Limits:

• weak credit demand;
• asset-price inequality.

13. Supply-Side Policy

Market-based:

• tax reform;
• deregulation;
• labour-market flexibility;
• competition.

Interventionist:

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

Effects: LRAS/productivity.

A*: Supply-side policies often have long time lags.

14. Phillips Curve

Short-run: possible inverse unemployment-inflation relationship.

Long run: expectations can eliminate trade-off.

Useful when discussing:

• NAIRU;
• demand management;
• supply shocks.

15. Financial Markets and Monetary System

Functions:

• savings;
• borrowing;
• payments;
• risk;
• liquidity.

Commercial Banks

Create credit and intermediate funds.

Central Bank

• monetary policy;
• lender of last resort;
• financial stability.

Financial Instability

Can arise through:

• excessive leverage;
• asset bubbles;
• maturity mismatch;
• confidence collapse.

Real-world example — 2008 financial crisis

The crisis illustrates how financial-market failures can transmit into the real economy through credit contraction, falling confidence and recession.

16. International Trade

Comparative Advantage

Trade can benefit countries where opportunity costs differ.

Even if one country has absolute advantage in both goods, comparative advantage can create mutual gains.

Assumptions:

• low transport cost;
• factors move between industries;
• no major externalities;
• stable terms of trade.

Protectionism

Tools:

• tariff;
• quota;
• subsidy;
• regulation.

Arguments for:

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

Against:

• higher prices;
• inefficiency;
• retaliation;
• reduced competition.

Exchange Rates

Floating exchange rate determined by currency supply/demand.

Demand for sterling rises with:

• exports;
• inward investment;
• higher relative returns.

Appreciation

Effects:

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

Depreciation

Opposite.

A*: Current-account impact depends on:

• PED exports/imports;
• time lag;
• supply capacity.

Current Account

Includes:

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

Deficit may reflect:

• weak competitiveness;
• high domestic demand;
• investment inflows.

Not automatically harmful.

17. Globalisation

Features:

• trade;
• capital mobility;
• migration;
• global supply chains;
• TNCs.

Benefits:

• specialisation;
• competition;
• lower prices;
• investment.

Costs:

• structural unemployment;
• inequality;
• tax competition;
• environmental impact;
• vulnerability to shocks.

Real-world example — semiconductor supply chains

Global semiconductor supply illustrates benefits of specialisation but also vulnerability when production is concentrated geographically.

18. Economic Development

Development wider than GDP.

Indicators:

• HDI;
• life expectancy;
• education;
• income;
• poverty.

Barriers

• weak institutions;
• low savings;
• poor infrastructure;
• conflict;
• debt;
• primary-product dependence.

Policies

• aid;
• trade;
• FDI;
• microfinance;
• education;
• infrastructure;
• debt relief.

A*: effectiveness depends on governance and local conditions.

AQA DIAGRAM BANK

Students should confidently draw:

• PPF;
• demand/supply;
• tax;
• subsidy;
• price floor/ceiling;
• externality diagrams;
• monopoly/competition cost-revenue;
• labour market;
• monopsony;
• minimum wage;
• AD/AS;
• LRAS shift;
• Phillips curve;
• foreign exchange market;
• tariff.

For every diagram:

1. correct axes;
2. correct curve labels;
3. initial equilibrium;
4. shift/intervention;
5. new equilibrium;
6. analytical explanation.

REAL-WORLD EXAMPLE BANK

AQA ESSAY METHOD

15/25 Marker

Use: KAA → Evaluation → KAA → Evaluation → Judgement

KAA:

• precise theory;
• diagram;
• chain;
• application.

Evaluation:

• assumption;
• magnitude;
• time;
• elasticity;
• state of economy;
• unintended effect.

Conclusion

Do not repeat.

Answer:

• which effect/policy is strongest?
• why?
• under what condition?
• short or long run?

COMMON LOST MARKS

• shift vs movement confusion;
• PED sign/magnitude errors;
• revenue confused with profit;
• average vs marginal confusion;
• monopoly drawn without cost/revenue labels;
• external cost diagram missing MSC/MPC;
• AD and demand treated as same concept;
• inflation confused with high prices;
• deficit confused with debt;
• appreciation/depreciation effects reversed;
• comparative advantage confused with absolute advantage;
• current-account deficit automatically described as bad;
• evaluation = “it depends” with no economic condition.