ACCA Applied Knowledge · Business and Technology
Microeconomic Factors for ACCA Business and Technology
Microeconomic factors are the forces that shape how individual markets and firms behave: demand, supply, price, elasticity, government intervention, market failure, competition and costs. To solve BT questions, identify which force changes, predict the direction of price and quantity, then match the answer to the exact definition.
What this chapter covers
This chapter looks at how single markets and single businesses work. You start with demand and supply, which explain how prices are set. You then study elasticity, which measures how strongly buyers and sellers react to price or income changes.
Next you see what happens when governments step in with taxes, subsidies, price ceilings and price floors. You also study market failure, where free markets give poor results, for example through pollution or public goods. The last topics cover market structures, from perfect competition to monopoly, and the costs and size of firms, including economies of scale.
In BT, this chapter links to the business environment, where firms respond to competition and regulation. It also links to strategy, pricing and the role of government. In Section A you will meet short objective questions on definitions and direction of change. In Section B, the multi-task question on this area can ask you to apply the ideas to a short scenario.
This chapter is full of precise terms and cause-and-effect rules, which suits objective test questions. Marks come from knowing definitions exactly and predicting what happens when something changes. Once you learn the logic, many questions can be answered in under a minute. That saves time for harder questions elsewhere in the paper. The ideas also support later chapters on competition, pricing and government policy, so the effort pays off more than once.
Microeconomic factors: topics in the order to study them
- 1Demand, Supply and Market EquilibriumEverything else builds on how demand, supply and price interact, so you learn it first.
- 2Elasticity of Demand and SupplyElasticity measures the responses you just learned, so it comes straight after the basic model.
- 3Price Mechanism and Market InterventionYou need equilibrium and elasticity to see who gains and loses from taxes, subsidies and price controls.
- 4Market Failure and ExternalitiesThis explains why governments intervene at all, using the intervention tools you now know.
- 5Market Structures and CompetitionWith the pricing basics clear, you can compare how firms behave in different competitive settings.
- 6Costs, Economies of Scale and Firm SizeCost ideas explain why some structures and firm sizes arise, so they work well as the closing topic.
How to prepare Microeconomic factors
Treat this chapter as a set of linked rules. Learn each rule, then practise applying it to short scenarios.
- Read the six topics in the order given, and write one-line definitions of each key term in your own words.
- Draw simple demand and supply diagrams on paper. Shift each curve and note what happens to price and quantity.
- Learn the elasticity categories and what each means for revenue when price changes. Practise a few calculations until the method is automatic.
- Make a comparison list of the market structures: number of firms, product type, barriers to entry and pricing power.
- Do objective test questions after each topic. For every wrong answer, write down the rule you missed.
- Practise multiple response questions by checking each option separately against the rule before choosing.
- Finish with a mixed set of questions and a timed run, so you can switch quickly between topics.
Common mistakes in Microeconomic factors
Confusing a movement along a curve with a shift of the curve.
Fix: Ask what caused the change. If the price itself changed, it is a movement. If any other factor changed, the curve shifts.
Getting the direction of a shift wrong when a cost or tax changes.
Fix: Decide whether buyers or sellers are affected. Then shift that curve, and read the new price and quantity from the new equilibrium.
Mixing up elastic and inelastic, or ignoring the sign of the result.
Fix: Remember that elastic means a bigger response than the price change. Keep the sign for income and cross elasticity, because it carries meaning.
Treating price controls as if they always help the people they target.
Fix: Compare the controlled price with equilibrium. Then state the shortage or surplus it creates.
Mixing up the features of market structures, especially monopolistic competition and oligopoly.
Fix: Learn them by number of firms, product type and barriers to entry. Oligopoly has few large, interdependent firms.
Selecting the wrong number of answers in multiple response questions.
Fix: Read the instruction for how many to select. Test every option against the rule before you commit.
Last-day revision: Microeconomic factors
- A rise in price causes a movement along the demand curve. A change in another factor shifts the curve.
- At equilibrium, quantity demanded equals quantity supplied.
- Price elasticity of demand = % change in quantity demanded ÷ % change in price.
- Elastic demand means the response is larger than the price change. Inelastic means it is smaller.
- Income elasticity is positive for normal goods and negative for inferior goods.
- A price ceiling set below equilibrium creates a shortage. A price floor set above equilibrium creates a surplus.
- A subsidy lowers the cost of supply and shifts the supply curve to the right.
- Negative externalities are costs imposed on third parties. Positive externalities are benefits to third parties.
- Public goods are non-excludable and non-rival, so private firms struggle to provide them.
- A monopoly is a single seller with high barriers to entry and strong pricing power.
- Perfect competition has many sellers, identical products and no barriers to entry.
- Economies of scale lower average cost as output grows. Diseconomies raise it when a firm gets too large.
Microeconomic factors practice questions
- A government imposes a per-unit tax on a product with highly inelastic demand and fairly elastic supply. Which statement best describes the …
- A bakery rents its premises for a fixed monthly amount and pays its bakers by the hour for hours actually worked. In the short run, which of…
- A government sets a maximum price for rental housing below the free-market equilibrium rent. What is the most likely immediate result?
- A chemical factory discharges waste into a river, and downstream fishing businesses suffer lower catches. The factory's selling price reflec…
- In the market for tea, the price of coffee, a substitute, rises sharply while everything else stays constant. What is the most likely effect…
- Which of the following is an example of a government subsidy intended to correct a market failure?
- A government gives a per-unit subsidy to producers of solar panels. What is the effect on the market, all else equal?
- In a market for handmade chairs, the government introduces a per-unit tax on producers. Which of the following correctly describes the immed…
Microeconomic factors in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Microeconomic factors: frequently asked questions
How much of the BT exam is microeconomics?
Microeconomic ideas appear in the business environment part of the syllabus and can be tested in Section A and in the Section B multi-task question for that area. ACCA does not fix the exact number of questions, so learn the whole chapter.
Do I need to draw diagrams in the computer-based exam?
You do not draw diagrams in the exam. You still need to understand them, because picturing a curve shift helps you answer questions on price and quantity quickly.
Is elasticity calculation heavy?
No. You usually need simple percentage changes and a division, then a judgement about whether demand is elastic or inelastic. Practise a few examples and the method becomes quick.
What is the best way to remember market structures?
Use a small comparison table in your notes with number of firms, product type, barriers to entry and pricing power. Then test yourself by covering one column and recalling it.
Can I study this chapter on my phone?
Yes. Definitions, rules and short question practice suit a phone well. Sketch diagrams on paper when you can, as it makes the shifts easier to remember.