AQA A Level Economics
AQA A Level Economics 3.1.4 Production, Costs and Revenue Exam Questions
Free AQA A Level Economics exam questions for 3.1.4 Production, Costs and Revenue, with a mark scheme for every pack. Covers productivity, the division of labour, short-run and long-run costs, economies of scale, revenue, profit and technological change.
3.1.4 Production, Costs and Revenue exam questions
1 question pack of real past exam questions, each with its mark scheme. Do not stop after a few: answer as many as you can without notes, then mark every answer with the mark scheme. The more questions you do, the more quickly you will spot how examiners ask about each idea.
About AQA A Level Economics 3.1.4 Production, Costs and Revenue
Production, costs and revenue is section 3.1.4 of AQA A Level Economics and is examined on Paper 1. It covers production and productivity, specialisation and the division of labour, short-run costs and the law of diminishing returns, long-run average costs, economies and diseconomies of scale, average, marginal and total revenue, normal and supernormal profit, and the effects of technological change on production and markets. These cost and revenue curves are the toolkit for market structures in 3.1.5, so examiners expect accurate diagrams, correct definitions and the ability to explain why curves have their shapes. Calculation questions on costs, revenue and profit appear regularly.
What you need to know
- Production and productivity Production converts inputs into outputs. Productivity is output per unit of input, such as labour productivity = output / number of workers. Specialisation and the division of labour raise productivity but can cause boredom and dependency.
- Short-run costs In the short run at least one factor is fixed. The law of diminishing returns means marginal product eventually falls as more of a variable factor is added, so marginal cost rises. Total cost = fixed cost + variable cost; MC cuts AC and AVC at their minimum points.
- Long-run costs In the long run all factors are variable. The LRAC curve shows the lowest cost of producing each output. Economies of scale (technical, purchasing, managerial, financial, risk-bearing) reduce LRAC; diseconomies (communication, coordination, motivation) increase it. Minimum efficient scale is the lowest output at which LRAC is minimised.
- Revenue Total revenue = price x quantity, average revenue = TR / Q, marginal revenue is the change in TR from one more unit. For a price taker AR = MR; with a downward sloping demand curve MR is below AR, and TR is maximised where MR = 0.
- Profit Profit = TR - TC. Normal profit is the minimum needed to keep resources in their current use and is included in costs; supernormal profit is anything above this. Profit is maximised where MC = MR.
- Technological change Invention, innovation and creative destruction can lower costs, create new products and change market structures. Process innovation shifts cost curves down; product innovation can create new markets.
Common mistakes in 3.1.4 Production, Costs and Revenue
- Confusing diminishing returns with diseconomies of scale. Diminishing returns are a short-run idea with a fixed factor; diseconomies of scale are long-run with all factors variable.
- Drawing MC cutting AC anywhere. MC must cut AC and AVC at their lowest points.
- Saying a firm earning normal profit is making no money. Normal profit is a cost that rewards enterprise; zero supernormal profit still means the owner is adequately rewarded.
- Listing economies of scale without explaining them. Explain why the specific economy lowers average cost, for example bulk buying reduces cost per unit of inputs.
- Mixing up productivity and production. Production is total output; productivity is output per unit of input.
Try three 3.1.4 Production, Costs and Revenue exam-style questions
1. A firm has fixed costs of 2000 pounds and variable costs of 6 pounds per unit. It sells 500 units at 12 pounds each. Calculate its average total cost and profit. (3 marks)
Show the mark scheme answer
Total cost = 2000 + 6 x 500 = 5000 pounds; ATC = 5000 / 500 = 10 pounds; total revenue = 12 x 500 = 6000 pounds so profit = 1000 pounds.
2. Explain why short-run average cost curves are usually U-shaped. (4 marks)
Show the mark scheme answer
At first average fixed cost falls as output rises, spreading fixed costs; marginal product initially rises so MC falls; after a point the law of diminishing returns applies because at least one factor is fixed; MC rises above AC and pulls AC up, giving the U shape.
3. Explain two economies of scale a large supermarket chain may benefit from. (6 marks)
Show the mark scheme answer
Purchasing economies: buying in bulk gives discounts from suppliers so cost per unit of stock falls; financial economies: lower risk lets it borrow at lower interest rates, reducing average costs; or technical/managerial economies with explanation; each linked to falling long-run average cost.
3.1.4 Production, Costs and Revenue FAQs
What does AQA A Level Economics 3.1.4 cover?
It covers production and productivity, the division of labour, short-run and long-run costs, diminishing returns, economies and diseconomies of scale, revenue, profit and the effects of technological change.
Which paper is 3.1.4 examined in?
It is assessed on Paper 1, Markets and market failure, and can also appear on Paper 3, Economic principles and issues, which draws on the whole specification.
Which diagrams do I need for costs and revenue?
Learn the short-run AC, AVC and MC curves, the long-run average cost curve with economies and diseconomies of scale, and AR and MR for both price takers and price makers. These are reused in every market structure diagram.
