If firms in an industry experience significant external economies of scale, this is most likely to result in
an upward shift in the market demand curve for the industry's products.
a downward shift in the long-run average cost curves of individual firms.
a movement upwards along the existing short-run average cost curve.
an increase in the market power of a single dominating monopoly.
156 exam-style questions on AQA A Level Economics 1.4 Production, costs and revenue, covering 1.4.1 Production and productivity, 1.4.2 Specialisation, division of labour and exchange, 1.4.3 The law of diminishing returns and returns to scale (A-level only), 1.4.4 Costs of production, 1.4.5 Economies and diseconomies of scale, 1.4.6 Marginal, average and total revenue, 1.4.7 Profit, and 1.4.8 Technological change (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.