A-Level Economics: Business Objectives and the Growth of Firms

Traditional theory assumes that every firm maximises profit, but A level Economics asks you to question that assumption and to explain what happens when firms pursue other goals. This material trains the objectives of firms and the ways firms grow, two topics that feed directly into the theory of market structures and competition policy.

The objectives section is built around one numerical example that runs through three questions. A firm faces the demand curve P = 40 − 2Q and has total cost TC = 64 + 4Q. You find the profit-maximising output where marginal cost equals marginal revenue, the revenue-maximising output where marginal revenue is zero, and the largest output that still earns normal profit, where average revenue equals average cost. Comparing the three outcomes (output of 9, 10 and 16 units) shows clearly how price, output and profit change as the objective changes, which is exactly the comparison that diagram questions ask for.

You then look at why firms may not maximise profit. The divorce of ownership from control creates a principal-agent problem between shareholders and managers; you identify the measures, such as share options and performance-related pay, that realign incentives. Satisficing, survival, growth, market share and limit pricing complete the list of alternative objectives.

The growth section distinguishes organic growth from external growth through mergers and takeovers, and classifies integration as horizontal, backward or forward vertical, or conglomerate, each with its typical motive: economies of scale and market power, security of supply or of outlets, and diversification of risk. You also study the constraints on growth, such as finance, market size and owners' wishes, and the reasons firms sometimes demerge to focus on their core business and escape diseconomies of scale.

The material offers a 12-question quiz with explanations, a flashcard deck of the key terms, a printable written sheet of eight questions with model answers (including a full calculation and two evaluative tasks), and an oral exam in which an examiner questions you on objectives and growth one question at a time. The content follows the DfE subject content for business objectives; for example, Pearson Edexcel covers growth and demergers in Theme 3, and AQA covers the objectives of firms within its market structures section.

  • Apply the profit-maximising rule MC = MR and compare it with revenue maximisation (MR = 0)
  • Identify sales volume maximisation subject to normal profit (AR = AC) on a numerical example
  • Explain the divorce of ownership from control, the principal-agent problem and satisficing
  • Distinguish organic growth from horizontal, vertical and conglomerate integration
  • Analyse the motives for, and constraints on, the growth of firms and the reasons for demergers

Practice material written by Zestly, based on the DfE GCE A level economics subject content (2014), area 'Competition and market power: business objectives', with examples drawn from the AQA (objectives of firms) and Pearson Edexcel (Theme 3, business growth and business objectives) specifications.

Sample question

A firm faces the demand curve $P = 40 - 2Q$, so its marginal revenue is $MR = 40 - 4Q$. Its total cost is $TC = 64 + 4Q$, so marginal cost is constant at £4. At what output does the firm maximise profit, and what price does it charge?

See the answer

$Q = 9$ at a price of £22

Profit is maximised where $MR = MC$: $40 - 4Q = 4$, so $Q = 9$. The price comes from the demand curve: $P = 40 - 2 \times 9 = 22$, so £22. Profit is $22 \times 9 - (64 + 4 \times 9) = 198 - 100 = 98$, so £98. $Q = 10$ is where revenue is maximised, $Q = 16$ is where $AR = AC$, and $Q = 18$ is where price equals marginal cost.

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