ECON101: Economics 1 Exam Pack — DUT National Diploma in Management Accounting

This exam pack provides comprehensive, exam‑focused study notes for ECON101 / Economics 1 as typically offered at Durban University of Technology (DUT) within the National Diploma in Management Accounting. It is written to mirror the style and depth of first‑year economics modules used at South African institutions (including DUT, UNISA, CUT and others), with a strong focus on South African examples, terminology and exam‑type explanations. The notes integrate microeconomics and macroeconomics, linking theory directly to management accounting and business decision‑making.

The material is organised into five major sections: core microeconomic foundations, demand–supply analysis, market structures and efficiency, core macroeconomic concepts, and South African macro policy and exam‑style applications. Use this document as a structured revision pack before tests, assignments, and the final ECON101 exam.

1. Foundations of Economics for Management Accounting (DUT ECON101)

1.1 What Is Economics? (DUT, UNISA, CUT Context)

Economics is the study of how individuals, firms and governments allocate scarce resources to satisfy unlimited wants. In the context of DUT’s National Diploma in Management Accounting, ECON101 focuses on how basic economic principles support business decisions, costing, budgeting and performance evaluation.

Key elements:

• Scarcity
  Resources (labour, capital, time, raw materials, money) are limited. For example, a Durban manufacturing firm has only 120 labour hours per week and a fixed number of machines, but multiple product lines competing for those hours.

• Choice
  Because resources are scarce, decision makers must choose between alternatives. A management accountant at a Durban SME may have to decide whether to allocate R100 000 to a new packaging machine or to a marketing campaign.

• Opportunity Cost
  The opportunity cost of an action is the value of the next best alternative forgone. If DUT invests R5 million in new lecture theatres, the opportunity cost may be the computer labs that could not be upgraded.

• Economic Agents

  • Households: supply labour, consume goods and services.
  • Firms: demand factors of production, produce goods and services.
  • Government: regulates, taxes, spends, redistributes income.
  • External sector: trade with the rest of the world (exports, imports).

Examiners at DUT and UNISA often ask: “Define scarcity and explain why it gives rise to opportunity cost.” A full answer must connect limited resources, unlimited wants, and the need for choice.

1.2 Positive vs Normative Economics

Positive economics deals with statements that can be tested or verified:

• “An increase in VAT from 15% to 16% will reduce consumer spending in KwaZulu‑Natal retail stores.”

Normative economics deals with value judgements:

• “The government should increase VAT to reduce the budget deficit.”

Exam tip (ECON101, UNISA ECS1501 style):

• When asked to distinguish positive and normative statements, underline or highlight any words like “should”, “ought”, “fair”, “equitable” — these usually indicate normative views.

1.3 Microeconomics vs Macroeconomics

In DUT’s Economics 1, you need to clearly separate:

• Microeconomics:

  • Focus: individual consumers, firms, specific markets.
  • Topics: demand and supply, elasticity, production, costs, market structure (perfect competition, monopoly, oligopoly).
  • Example: How will a 10% increase in the price of petrol affect the demand for private taxi services in Durban?

• Macroeconomics:

  • Focus: the economy as a whole.
  • Topics: GDP, unemployment, inflation, fiscal policy, monetary policy, balance of payments, economic growth.
  • Example: What is the impact of load‑shedding on South Africa’s GDP growth rate?

In management accounting, microeconomics underpins pricing and output decisions, while macroeconomics provides the economic environment assumptions for budgets and forecasts.

1.4 The Basic Economic Problem and the PPC

The basic economic problem is how to allocate scarce resources to meet unlimited wants, answering:

1. What to produce?
2. How to produce?
3. For whom to produce?

The Production Possibility Curve (PPC), also called the Production Possibility Frontier (PPF), shows the maximum possible combinations of two goods or services that an economy can produce when resources are fully and efficiently utilised.

Example:

Assume South Africa can produce only textiles and maize, with available technology and resources. A simplified PPC table might look like this:

Combination	Textiles (units)	Maize (tons)
A	0	100
B	20	90
C	40	70
D	60	40
E	80	0

• Points on the curve (B, C, D) = efficient.
• Points inside the curve = inefficient (e.g. high unemployment, underused factories).
• Points outside the curve = unattainable with current resources / technology.

Opportunity cost on the PPC:

Moving from C (40 textiles, 70 maize) to D (60 textiles, 40 maize):

• Gain: +20 textiles
• Sacrifice: −30 maize
• Opportunity cost of 20 additional units of textiles = 30 tons of maize.

In exams, you may need to:

• Draw a PPC with labels.
• Indicate a point of unemployment (inside the curve).
• Show a rightward shift (economic growth due to improved technology, capital investment, or education).

1.5 Types of Economic Systems

Economies differ in how they answer the three basic economic questions:

1. Market Economy (Free Market)

   • Decisions mainly by private individuals and firms through price signals.
   • Example features: private ownership, profit motive, competition, limited government intervention.
   • South Africa is a mixed but market‑orientated economy.

2. Command Economy (Planned)

   • Government decides what, how and for whom to produce.
   • State ownership of key resources.
   • Historical example: Former Soviet Union.

3. Mixed Economy

   • Combination of market and government decisions.
   • South Africa: government provides education, health and social grants; private sector runs most businesses.

Possible exam question (DUT ECON101 / UNISA ECS1601 style):

Compare a market economy and a mixed economy, and explain which system best describes South Africa.

A strong answer emphasises that South Africa has a private sector‑driven market system with significant government involvement through public enterprises (Eskom, Transnet), regulation (Competition Commission), and social programmes (NSFAS, grants).

1.6 Basic Concepts: Factors of Production and Circular Flow

Factors of Production:

1. Land: natural resources (land, minerals, water).
2. Labour: human effort (skilled, semi‑skilled).
3. Capital: machinery, buildings, equipment.
4. Entrepreneurship: combines the other factors, bears risk, makes decisions.

Rewards:

• Land → Rent
• Labour → Wages & salaries
• Capital → Interest
• Entrepreneurship → Profit

Circular Flow of Income Model:

At ECON101 level, understand the basic two‑sector and three‑sector models.

• Two‑sector model (households and firms):

  • Households supply factors → firms → receive factor incomes.
  • Firms supply goods/services → households → receive consumer expenditure.

• Three‑sector model adds government:

  • Government taxes households and firms (T).
  • Government spends on goods, services and transfers (G).

In more advanced macro sections, we extend this to include the financial sector (savings, investment) and foreign sector (exports, imports). The circular flow is central to understanding GDP measurement, which recurs in ECON101 exams.

2. Demand, Supply and Market Equilibrium (with South African Examples)

2.1 The Law of Demand

Definition:
The law of demand states that, ceteris paribus (all other factors held constant), there is an inverse relationship between the price of a good and the quantity demanded. As price increases, quantity demanded decreases; as price decreases, quantity demanded increases.

Demand is represented by a downward‑sloping curve on a price–quantity graph.

Example (South African context):

If the price of a 2 kg maize meal in Durban supermarkets rises from R30 to R40, households — especially low‑income ones — will buy fewer units or switch to cheaper brands.

Individual vs Market Demand:

• Individual demand: quantity demanded by one consumer at each price.
• Market demand: horizontal sum of all individual demands.

Suppose three Durban students’ weekly demand for vetkoek at different prices is:

Price per vetkoek (R)	Sipho	Lindiwe	Thabo	Market Demand
2	5	4	3	12
4	3	2	1	6
6	1	1	0	2

The market demand curve is constructed by adding horizontally at each price.

2.2 The Law of Supply

Definition:
The law of supply states that, ceteris paribus, there is a positive relationship between the price of a good and the quantity supplied. As price increases, quantity supplied increases; as price decreases, quantity supplied decreases.

Supply is represented by an upward‑sloping curve.

Example:

If the price of avocados at the Durban Fresh Produce Market increases from R40 to R60 per crate, more farmers will find it profitable to supply avocados; some may shift land from other crops to avocados.

2.3 Movements vs Shifts in Demand and Supply

A common exam area is distinguishing:

• Movement along a curve: caused by a change in the good’s own price.
• Shift of a curve: caused by non‑price factors (determinants of demand or supply).

2.3.1 Determinants of Demand (Shift Factors)

Factors that shift the entire demand curve:

1. Income

   • Normal goods: demand increases when income rises (e.g. dining out).
   • Inferior goods: demand decreases when income rises (e.g. no‑name brand bread vs premium brands).

2. Prices of Related Goods

   • Substitutes: e.g. chicken and beef. An increase in the price of beef increases demand for chicken.
   • Complements: e.g. cars and petrol; printers and ink.

3. Tastes and Preferences
   E.g. greater health awareness may reduce demand for sugary drinks.

4. Expectations
   If consumers expect fuel prices to rise sharply next month, they may buy more petrol now.

5. Number of Buyers
   Population growth, urbanisation or tourism increases market demand.

Exam application:

“Illustrate, with a clearly labelled diagram, the effect of an increase in household income on the demand for restaurant meals in Durban.”

Answer: Draw the demand curve shifting rightward from D1 to D2; price and quantity both tend to rise, ceteris paribus.

2.3.2 Determinants of Supply (Shift Factors)

Factors that shift the supply curve:

1. Input Prices (Costs)
   If wages or electricity tariffs rise, production costs increase and supply decreases (curve shifts left).

2. Technology
   Improved technology increases productivity, shifting supply to the right.

3. Number of Sellers
   Entry of new firms increases market supply; exit of firms reduces supply.

4. Expectations
   If farmers expect maize prices to rise next season, they might store current harvest, reducing current supply.

5. Government Policies
   Taxes, subsidies, regulations can shift supply.

Example (South African petrol market):

• Global oil price increases → higher input cost → petrol supply decreases → leftward shift of supply curve.

2.4 Market Equilibrium, Surplus and Shortage

Market equilibrium occurs where quantity demanded = quantity supplied. This determines the equilibrium price (P*) and equilibrium quantity (Q*).

Example numerical table:

Price (R)	Quantity Demanded (units)	Quantity Supplied (units)
10	100	20
20	80	40
30	60	60
40	40	80
50	20	100

At R30: QD = 60, QS = 60 → equilibrium.

• At R20: QD > QS → excess demand (shortage) of 40 units; upward pressure on price.
• At R40: QS > QD → excess supply (surplus) of 40 units; downward pressure on price.

Diagram explanation is often required in DUT exams:

• Label axes: Price (vertical), Quantity (horizontal).
• Draw demand curve (downwards) and supply curve (upwards).
• Mark intersection point E (P*, Q*).

2.5 Government Intervention: Price Floors and Ceilings

Governments sometimes fix prices to achieve social or political goals.

2.5.1 Price Ceiling (Maximum Price)

A price ceiling is a legal maximum price below the equilibrium price.

Example:
A rent control in inner‑city Durban: suppose equilibrium rent is R5 000 per month, but government sets a maximum rent of R3 500 to protect low‑income tenants.

Effects:

• At R3 500, quantity demanded of flats exceeds quantity supplied → shortage.
• Landlords may reduce maintenance; informal payments might arise (black market).

Graphically: horizontal line at price ceiling below equilibrium price; show shortage.

2.5.2 Price Floor (Minimum Price)

A price floor is a legal minimum price above equilibrium.

Example:
Minimum wage law. Suppose the equilibrium wage for farm workers is R17 per hour, but government sets a legal minimum wage of R22 per hour.

Effects:

• At R22, labour supply > labour demand → potential unemployment (surplus of labour).
• Workers who keep their jobs earn higher wages, but some may lose their jobs.

In agricultural markets, minimum prices can also be used to protect farmers, leading to surplus stock that must be bought by government.

2.6 Elasticity Concepts (Key for Management Accounting Decisions)

Elasticity measures the responsiveness of one variable to changes in another.

2.6.1 Price Elasticity of Demand (PED)

Formula (arc elasticity, common in ECON101):

[
\text{PED} = \frac{%\ \text{change in quantity demanded}}{%\ \text{change in price}}
]

Signs:

• PED is typically negative (inverse relationship), but in exams the focus is on the absolute value.

Interpretation:

• |PED| > 1 → Elastic demand (quantity responds strongly to price changes).
• |PED| < 1 → Inelastic demand.
• |PED| = 1 → Unit elastic.

Example:

Price of a bus ticket from Durban CBD to Umlazi increases from R10 to R12 (20% increase). Quantity demanded falls from 1 000 passengers per day to 900 (10% decrease).

[
\text{PED} = \frac{-10%}{+20%} = -0.5
]

|PED| = 0.5 → demand is inelastic.

Implication: increasing the ticket price increases total revenue, because the percentage increase in price is larger than the percentage decrease in quantity demanded.

Importance for management accountants:

• Firms with inelastic demand (e.g. basic food, petrol in short run) may increase prices to increase revenue.
• Firms with elastic demand must be cautious: price increases can reduce revenue.

2.6.2 Other Elasticities (Briefly)

• Income Elasticity of Demand (YED): responsiveness of demand to income changes.

  • Positive YED → normal good; negative → inferior good.

• Cross‑Price Elasticity of Demand (XED): responsiveness of demand for one good to changes in price of another good.

  • Positive XED → substitutes; negative → complements.

• Price Elasticity of Supply (PES): responsiveness of quantity supplied to price changes.

  • Influenced by time period, spare capacity, storability.

Examiners may ask for definitions, interpretations of numerical values, and short numerical calculations.

3. Production, Costs and Market Structures (DUT Economics 1 / UNISA ECS2601 Style)

3.1 Theory of Production in the Short Run and Long Run

Firms convert inputs (land, labour, capital) into outputs (goods/services). ECON101 distinguishes:

• Short run: at least one factor of production is fixed (usually capital).
• Long run: all factors are variable; firms can enter or exit the industry.

3.1.1 Short‑Run Production Functions

Key concepts:

• Total Product (TP): total output produced with given units of a variable factor (e.g. labour).

• Marginal Product (MP): additional output produced by employing one more unit of labour.
  [
  MP = \Delta TP / \Delta L
  ]

• Average Product (AP): output per unit of labour.
  [
  AP = TP / L
  ]

Example (toy numerical):

Workers (L)	TP (units)	MP (units)	AP (units)
1	10	10	10
2	25	15	12.5
3	39	14	13
4	48	9	12
5	54	6	10.8

Law of Diminishing Marginal Returns:

• As more units of a variable factor (e.g. labour) are added to a fixed factor (e.g. machinery), MP eventually decreases.
• At first, specialisation and teamwork raise MP; later, overcrowding and inefficiency reduce MP.

Short‑answer exam questions often ask you to identify the point where diminishing returns set in (when MP starts to fall).

3.2 Cost Concepts for Management Accounting

For management accounting students, cost concepts are central.

3.2.1 Short‑Run Cost Curves

Key cost types:

• Total Fixed Cost (TFC): costs that do not vary with output (rent, insurance).

• Total Variable Cost (TVC): costs that vary with output (raw materials, direct labour).

• Total Cost (TC):
  [
  TC = TFC + TVC
  ]

• Average Fixed Cost (AFC):
  [
  AFC = TFC / Q
  ]

• Average Variable Cost (AVC):
  [
  AVC = TVC / Q
  ]

• Average Total Cost (ATC):
  [
  ATC = TC / Q = AFC + AVC
  ]

• Marginal Cost (MC): additional cost of producing one more unit.
  [
  MC = \Delta TC / \Delta Q
  ]

Typical relationships:

• AFC declines continuously as output increases (fixed cost spread over more units).
• AVC is U‑shaped due to diminishing marginal returns.
• ATC is U‑shaped and lies above AVC.
• MC curve intersects both AVC and ATC at their minimum points.

Example (simplified):

If TFC = R1 000 per week and TVC for producing 100 units is R2 000, then:

• TC = R3 000
• AFC = 1 000 / 100 = R10 per unit
• AVC = 2 000 / 100 = R20 per unit
• ATC = 30 per unit

This costing logic links directly to break‑even analysis and cost‑volume‑profit (CVP) analysis in management accounting modules.

3.2.2 Long‑Run Costs and Economies of Scale

In the long run, firms can change all factors. The long‑run average cost (LRAC) curve is usually U‑shaped, reflecting:

• Economies of scale (decreasing LRAC as output increases):

  • Technical economies (specialised machinery).
  • Managerial economies (specialised managers).
  • Purchasing economies (bulk buying at lower unit prices).
  • Financial economies (better access to credit).
  • Marketing economies (spreading advertising over more units).

• Diseconomies of scale (increasing LRAC):

  • Managerial difficulties, communication problems.
  • Over‑bureaucratisation in large firms.

For example, a KwaZulu‑Natal manufacturing firm expanding from 1 000 to 10 000 units per month may initially reduce average costs (economies of scale) but might later face coordination issues raising costs.

3.3 Revenue Concepts and Profit Maximisation

To determine optimal output, firms consider revenue and cost.

• Total Revenue (TR):
  [
  TR = P \times Q
  ]

• Average Revenue (AR):
  [
  AR = TR / Q
  ]

• Marginal Revenue (MR):
  [
  MR = \Delta TR / \Delta Q
  ]

In perfect competition, AR = MR = price (P), since firms are price takers.

Profit (π):

[
\pi = TR – TC
]

Profit‑maximisation rule:

• Firms maximise profit where MR = MC and MC cuts MR from below.

Graphically:

• The distance between TR and TC (vertical) is greatest at the profit‑maximising output.
• In exam diagrams: show MC, ATC, MR (=P) and identify output Q* and profit area (if P > ATC) or loss area (if P < ATC).

3.4 Market Structures: Characteristics and Exam Comparisons

DUT and UNISA ECON101 exams commonly require you to compare market structures. Focus on characteristics: number of firms, type of product, entry barriers, price control, and examples.

3.4.1 Perfect Competition

Characteristics:

• Many small firms.
• Homogeneous (identical) products.
• Free entry and exit.
• Perfect information.
• Firms are price takers (no control over market price).

Examples (approximate): grain farming, some fresh produce markets.

Key exam points:

• In the long run, firms earn normal profit (P = minimum ATC).
• Demand curve facing an individual firm is perfectly elastic (horizontal at market price).

3.4.2 Monopoly

Characteristics:

• One dominant firm in the market.
• Unique product with no close substitutes.
• High barriers to entry (legal, technical, resource ownership, economies of scale).
• Price maker: has significant control over the price.

Examples in South Africa:

• Historically, Eskom (electricity), Transnet (rail, ports) — large state‑owned enterprises with monopoly or near‑monopoly positions.

Monopoly behaviour:

• Chooses Q where MR = MC, then sets price on demand curve.
• Typically charges higher prices and produces less output than perfect competition.

Exam questions often ask you to:

• Draw and label monopoly diagrams.
• Indicate deadweight loss compared to perfect competition (lost consumer and producer surplus).

3.4.3 Monopolistic Competition

Characteristics:

• Many firms.
• Differentiated products (branding, quality, features).
• Relatively free entry and exit.
• Some degree of price control.

Examples: restaurants in Durban CBD, hair salons, clothing stores.

In the short run, firms can earn economic profits. In the long run, entry of new firms erodes these profits until only normal profit remains.

Diagram features:

• Downward‑sloping demand (AR) curve.
• MR below AR.
• Like monopoly in shape, but more elastic demand due to many close substitutes.

3.4.4 Oligopoly

Characteristics:

• Few large firms dominate.
• Products may be homogeneous or differentiated.
• High barriers to entry.
• Interdependence: firms must consider rivals’ actions (price, advertising).

Examples in South Africa:

• Petrol retail market.
• Banking sector.
• Cellphone networks (Vodacom, MTN, Cell C, Telkom).

Key models:

• Collusive oligopoly (cartels).
• Non‑collusive oligopoly (kinked demand curve).

DUT exams sometimes ask:

“Explain why firms in an oligopoly are interdependent and describe the kinked demand curve model.”

Kinked demand curve:

• If an oligopolist raises price, competitors do not follow → demand is elastic above current price.
• If it lowers price, competitors follow → demand is inelastic below current price.
• This can create price rigidity (sticky prices).

3.5 Efficiency and Welfare: Consumer and Producer Surplus

Consumer Surplus:

• Difference between the maximum price consumers are willing to pay and the actual market price.
• Area under the demand curve and above the price line.

Producer Surplus:

• Difference between the market price and the minimum price at which producers are willing to supply.
• Area above the supply curve and below the price line.

At competitive equilibrium, total surplus (consumer + producer) is maximised. Government interventions or market power (monopoly) can create deadweight loss, reducing total welfare.

In exam diagrams:

• Show surplus triangles.
• Indicate deadweight loss when there is a tax, price control, or monopoly restriction of output.

4. Core Macroeconomic Concepts for DUT ECON101

4.1 Measuring Economic Activity: GDP and National Income

Gross Domestic Product (GDP) is the total market value of all final goods and services produced within a country’s borders in a given period (usually a year).

For South Africa, GDP is calculated and reported in both current prices and constant prices (real terms) by Statistics South Africa.

4.1.1 Methods of Measuring GDP

1. Production (Value Added) Method

   • Sum of value added by all sectors (agriculture, mining, manufacturing, services).
   • Value added = output value − value of intermediate goods.

2. Income Method

   • Sum of all incomes earned in the production process:
     • Wages and salaries.
     • Rent.
     • Interest.
     • Profits (company profits, mixed income of unincorporated businesses).
   • Adjusted for taxes and subsidies.

3. Expenditure Method (most common in exams)
   [
   GDP = C + I + G + (X – M)
   ]

   Where:

   • C = Consumption expenditure by households.
   • I = Investment (gross fixed capital formation, inventories).
   • G = Government spending on goods and services.
   • X = Exports.
   • M = Imports.

Example (hypothetical SA data for a year, in billion rand):

Component	Amount (R billion)
C (Consumption)	2 000
I (Investment)	500
G (Government)	700
X (Exports)	600
M (Imports)	650

Then:

• Net exports (X − M) = 600 − 650 = −50
• GDP = 2 000 + 500 + 700 − 50 = 3 150 billion rand.

Common exam tasks:

• Calculate GDP given data.
• Distinguish nominal GDP (current prices) and real GDP (constant prices, adjusted for inflation).
• Explain why double counting must be avoided (using only final goods, or value added).

4.1.2 GDP vs GNP and Related Concepts

• Gross National Product (GNP): value of all goods and services produced by the nation’s residents, regardless of location, plus net income from abroad.
• Net National Income (NNI): NNP at factor cost; adjusts for depreciation and indirect taxes/subsidies.

In many ECON101 exams, the focus remains on GDP and real vs nominal measures.

4.2 Economic Growth and the Business Cycle

Economic Growth:
Increase in the real GDP of an economy over time. It reflects the economy’s ability to produce more goods and services.

Business Cycle:

• The short‑run fluctuations in real GDP around its trend or potential level.
• Phases:
  1. Expansion (boom): rising output, falling unemployment.
  2. Peak: output at or above potential, possible inflation.
  3. Recession: declining output, rising unemployment.
  4. Trough: low point before recovery.

Factors influencing growth in South Africa:

• Physical capital accumulation (infrastructure investment).
• Human capital (education and training; e.g. DUT, UNISA, CUT graduates).
• Technological progress.
• Political and policy stability, property rights.

Management accountants need growth forecasts to prepare sales budgets, investment appraisals, and long‑term financial plans.

4.3 Unemployment: Types and Measurement

Unemployment occurs when people who are willing and able to work at the prevailing wage cannot find jobs.

4.3.1 Measuring Unemployment

South Africa’s unemployment statistics are compiled via the Quarterly Labour Force Survey (QLFS).

Key rates:

• Unemployment Rate:
  [
  \text{Unemployment Rate} = \frac{\text{Number of unemployed}}{\text{Labour force}} \times 100
  ]

Labour force = employed + unemployed (actively seeking work).

Example:

• Labour force = 20 million.
• Unemployed = 5 million.

[
\text{Unemployment Rate} = \frac{5}{20} \times 100 = 25%
]

Note: South Africa also reports an “expanded” or “broad” unemployment rate including discouraged work‑seekers.

4.3.2 Types of Unemployment

1. Frictional Unemployment

   • Short‑term, due to job search and matching.
   • E.g. recent DUT graduate taking time to find a suitable job.

2. Structural Unemployment

   • Mismatch between workers’ skills/location and available jobs.
   • E.g. workers in declining mining towns while new jobs are in technology sectors in cities.

3. Cyclical (Demand‑Deficient) Unemployment

   • Due to insufficient aggregate demand during recessions.
   • Firms lay off workers when sales fall.

4. Seasonal Unemployment

   • Seasonal variations in demand (e.g. tourism, agriculture).

Exam question patterns:

• “Explain, with examples from South Africa, the difference between structural and cyclical unemployment.”
• “Discuss the costs of unemployment to individuals, firms and governments.”

Costs include loss of income and skills, lower tax revenue, higher social grant spending, social problems.

4.4 Inflation: Concepts, Causes and Consequences

Inflation is a sustained increase in the general price level of goods and services over time, resulting in a decrease in the purchasing power of money.

In South Africa, inflation is measured by:

• Consumer Price Index (CPI): measures average price changes of a “basket” of consumer goods and services.

4.4.1 Measuring Inflation

If CPI was 100 in base year and 106 in the current year:

[
\text{Inflation rate} = \frac{106 – 100}{100} \times 100 = 6%
]

The South African Reserve Bank (SARB) targets an inflation rate of 3%–6%, with a preferred midpoint of about 4.5%.

4.4.2 Types and Causes of Inflation

1. Demand‑Pull Inflation

   • Caused by excess aggregate demand (C + I + G + X − M) exceeding the economy’s productive capacity.
   • Occurs when the economy is near full employment; spending “pulls” prices up.

2. Cost‑Push Inflation

   • Caused by rising production costs (wages, raw materials, imported inputs).
   • Example: a sharp increase in the global oil price raises energy and transport costs, pushing prices up.

3. Built‑In (Expectations) Inflation

   • Workers expect future inflation and demand higher wages.
   • Firms raise prices to protect profit margins, creating an inflationary spiral.

4.4.3 Consequences of Inflation

• Menu costs: costs of changing prices (catalogues, systems).

• Shoe‑leather costs: efforts to minimise cash holdings.

• Income redistribution:

  • Hurt: fixed‑income earners, savers with low interest rates.
  • Benefited: borrowers, if nominal interest rates do not fully adjust.

• Uncertainty: reduces investment, complicates budgeting and long‑term contracts.

For management accounting:

• Inflation complicates capital budgeting (discount rates, cash flow projections).
• Real vs nominal costing needs to be considered in long‑term projects.

4.5 The Circular Flow with Government and Foreign Sector

At an advanced ECON101 level, you need to integrate macro aggregates with the circular flow.

Five‑sector circular flow:

1. Households
2. Firms
3. Government
4. Financial Sector (banks, financial intermediaries)
5. Foreign Sector (rest of the world)

Key flows:

• Leakages:

  • Savings (S)
  • Taxes (T)
  • Imports (M)

• Injections:

  • Investment (I)
  • Government spending (G)
  • Exports (X)

For equilibrium in an open economy with government:

[
S + T + M = I + G + X
]

This identity is often tested conceptually:

• If injections > leakages → national income tends to rise (expansion).
• If leakages > injections → national income tends to fall (contraction).

5. Fiscal Policy, Monetary Policy and South African Exam‑Style Applications

5.1 Fiscal Policy: Government Budget, Taxation and Spending

Fiscal policy refers to the use of government spending (G) and taxation (T) to influence the level of economic activity, distribution of income and resource allocation.

In South Africa, fiscal policy is formulated by the National Treasury and implemented through the annual Budget Speech.

5.1.1 Government Budget

• Balanced budget: G = T.
• Budget deficit: G > T (government borrowing is needed).
• Budget surplus: G < T.

Example:

Suppose in a given year:

• Government revenue (mainly taxes) = R1 500 billion.
• Government expenditure = R1 650 billion.

Then:

• Budget deficit = 1 650 − 1 500 = R150 billion.
• Government must borrow (issue bonds) to finance this deficit.

Impact of deficits:

• In the short run, can stimulate demand and growth (if economy is below potential).
• In the long run, can increase public debt and higher interest obligations, potentially crowding out private investment.

5.1.2 Types of Fiscal Policy

1. Expansionary Fiscal Policy

   • Used during recession or high unemployment.
   • Involves:
     • Increasing G (e.g. infrastructure projects, public employment programmes).
     • Decreasing T (tax cuts).
   • Goal: increase aggregate demand, output and employment.

2. Contractionary Fiscal Policy

   • Used during high inflation.
   • Involves:
     • Decreasing G.
     • Increasing T.
   • Goal: reduce aggregate demand and pressure on prices.

Automatic stabilisers also play a role:

• Progressive income tax system.
• Unemployment benefits and social grants.

These automatically dampen fluctuations without deliberate policy changes.

Exam question example (DUT ECON101 / UNISA ECS2602):

“Explain how expansionary fiscal policy can be used to close a recessionary gap in South Africa.”

A strong answer will reference increased infrastructure spending, social programmes, and/or tax cuts, plus a diagram shifting the aggregate demand (AD) curve to the right.

5.2 Monetary Policy: SARB, Interest Rates and Money Supply

Monetary policy is conducted by the South African Reserve Bank (SARB), whose main objective is to achieve and maintain price stability (inflation targeting).

Key instruments:

• Repo rate: the rate at which SARB lends to commercial banks.
• Open market operations: buying and selling government securities.
• Reserve requirements: affecting banks’ ability to create credit (used less actively in SA).

5.2.1 Money Supply and Interest Rates

Broad process:

• When SARB reduces the repo rate:

  • Commercial banks can borrow more cheaply.
  • They reduce lending rates (prime rate).
  • Borrowing becomes cheaper for firms and households → investment (I) and consumption (C) increase.
  • Aggregate demand increases → higher output, possibly higher inflation.

• When SARB increases the repo rate:

  • Opposite effect: borrowing becomes more expensive.
  • Reduces C and I.
  • Slows down inflation but may increase unemployment in the short run.

Exam application:

“Explain, with the help of an AD–AS diagram, how an increase in interest rates can reduce demand‑pull inflation.”

Show AD shifting leftward until the price level falls from P1 to P2 and output from Y1 to Y2.

5.3 Aggregate Demand and Aggregate Supply (AD–AS Model)

The AD–AS framework links micro and macro concepts and is widely used in exams.

5.3.1 Aggregate Demand (AD)

Aggregate demand is the total planned spending on domestically produced goods and services at different price levels:

[
AD = C + I + G + (X – M)
]

AD is downward sloping in the price level–real output space, due to:

• Real balance effect (higher prices reduce real wealth).
• Interest rate effect.
• Net export effect.

Shifts in AD:

• To the right (AD increases) due to:

  • Higher C (consumer confidence, tax cuts, higher wealth).
  • Higher I (lower interest rates, improved business expectations).
  • Higher G (fiscal stimulus).
  • Higher X or lower M (currency depreciation, global demand).

• To the left (AD decreases) due to opposite factors.

5.3.2 Aggregate Supply (AS)

At ECON101 level, you may encounter:

• Short‑Run Aggregate Supply (SRAS): upward sloping; firms supply more output when prices rise if nominal wages and other input prices are sticky.

• Long‑Run Aggregate Supply (LRAS): vertical at the potential (full‑employment) level of output (Y_f).

Shifts in SRAS:

• To the right:

  • Lower input costs (wages, energy).
  • Improved productivity (technology, education).
  • Currency appreciation (cheaper imported inputs).

• To the left:

  • Higher input costs (oil shocks, wage hikes not matched by productivity).
  • Natural disasters, strikes, or supply bottlenecks.

Combined AD–AS analysis is used to discuss inflation, unemployment, growth and the effects of fiscal and monetary policies.

5.4 International Trade and Balance of Payments (South African Context)

South Africa is an open economy, heavily involved in import and export of goods and services.

5.4.1 Absolute and Comparative Advantage

• Absolute advantage: a country can produce a good using fewer resources or at lower cost than another country.
• Comparative advantage: a country can produce a good at a lower opportunity cost than another country.

Even if one country has an absolute advantage in all goods, both countries can gain from trade by specialising according to comparative advantage.

Example (simplified):

• South Africa: strong in mining (platinum, gold) and agriculture.
• Another country: strong in manufacturing or high‑tech goods.

Trade allows South Africa to export minerals and agricultural products, import machinery and electronics, and consume beyond its PPC.

5.4.2 Balance of Payments (BoP)

The balance of payments is a systematic record of all economic transactions between residents of a country and the rest of the world over a period.

Main components:

1. Current Account:

   • Trade balance of goods and services (exports − imports).
   • Net income (investment income, compensation of employees).
   • Net current transfers (remittances, aid).

2. Capital and Financial Account:

   • Capital transfers.
   • Foreign direct investment (FDI).
   • Portfolio investment.
   • Other investments (loans, bank deposits).

3. Official Reserves:

   • Changes in reserve assets held by the central bank.

By definition, when all items are correctly recorded (including errors and omissions), the overall BoP should balance.

In South Africa, the current account has often been in deficit, financed by capital inflows.

Exam questions might ask:

• Explain the structure of the BoP.
• Discuss causes and consequences of a current account deficit.
• Link BoP trends to exchange rate movements.

5.5 Exchange Rates and the Rand

An exchange rate is the price of one currency in terms of another.

Example:
If 1 US dollar (USD) costs R18, the exchange rate is R18/USD.

• Appreciation of the rand: rand becomes stronger (e.g. from R18/USD to R16/USD).
• Depreciation of the rand: rand becomes weaker (e.g. from R18/USD to R20/USD).

Effects of rand depreciation:

• Exports (X) become cheaper for foreign buyers → export volumes may increase.
• Imports (M) become more expensive → import volumes may decrease.
• Increases cost of imported inputs, which can cause cost‑push inflation.

For management accounting and budgeting:

• Exchange rate volatility affects the cost of imported materials, machinery, and foreign‑currency loans.
• Firms must factor in exchange rate forecasts when planning.

5.6 Typical DUT / UNISA‑Style Exam Question Patterns and Study Strategies

5.6.1 Common Question Types

1. Definitions and Short Explanations (2–5 marks each)

   • Example: Define opportunity cost.
   • Example: Distinguish between frictional and structural unemployment.

2. Diagram‑Based Questions (8–15 marks)

   • Draw, label and explain:
     • Demand and supply curves and shifts.
     • PPC and economic growth.
     • Cost curves (MC, ATC, AVC).
     • Market structure diagrams (perfect competition, monopoly).
     • AD–AS framework with policy shifts.

3. Numerical Problems (10–20 marks)

   • Elasticity calculations.
   • Simple GDP calculations using expenditure method.
   • Unemployment rates and inflation rates.

4. Essay‑Style Questions (15–25 marks)

   • Analyse policy responses to unemployment or inflation.
   • Discuss pros and cons of protectionism vs free trade.
   • Evaluate fiscal and monetary policy tools in South Africa.

5.6.2 Integrated Example Question

Question:

South Africa is experiencing a slowdown in economic growth with high unemployment and low inflation.
(a) Using an AD–AS diagram, show the current macroeconomic situation.
(b) Explain how expansionary fiscal policy could be used to address this problem.
(c) Discuss two potential drawbacks of relying on fiscal policy in the South African context.

Answer outline:

(a) Draw AD–AS with equilibrium output (Y1) below full employment (Y_f), price level relatively low.
(b) Government increases G and/or reduces T → AD shifts right from AD1 to AD2 → output increases towards Y_f, unemployment falls.
(c) Drawbacks:

• Budget deficit widens; public debt increases, potential crowding out in the long run.
• Implementation lags, leakages due to corruption or inefficiencies.
• Political constraints on reducing spending later.

5.6.3 Study Strategy Tailored for DUT National Diploma in Management Accounting

1. Link Economics to Accounting & Finance

   • When you learn about cost curves, think about cost classifications in management accounting (fixed vs variable, marginal costing).
   • When studying interest rates and inflation, link to time value of money and capital budgeting.

2. Use South African Data and News

   • Read brief SARB Monetary Policy Committee statements and National Budget summaries.
   • Relate theory to actual GDP growth, unemployment rates, inflation trends and rand movements.

3. Practice Diagrams

   • For every major concept (PPC, demand–supply, cost curves, market structures, AD–AS), be able to:
     • Draw from memory.
     • Label all axes and curves correctly.
     • Explain verbally what the diagram shows.

4. Work Through Past Papers

   • DUT often recycles question styles similar to UNISA’s ECS1501/ECS1601.
   • Practise under timed conditions:
     • 5 minutes per short question.
     • 20–25 minutes per long essay.

5. Formula Sheet and Quick References

Create your own one‑page reference with:

• PED, YED, XED, PES formulas.
• GDP = C + I + G + (X − M).
• Unemployment and inflation rate formulas.
• Profit = TR − TC; MR = ΔTR/ΔQ; MC = ΔTC/ΔQ.

This ECON101: Economics 1 Exam Pack is aligned with the depth and structure expected in first‑year economics modules in South Africa, specifically supporting students in the Durban University of Technology (DUT): National Diploma in Management Accounting. Integrating these notes with lecture materials, tutorials and past exam papers will build a strong conceptual foundation and exam‑ready competence in both microeconomic and macroeconomic analysis.