Revise Firms' costs, revenue and objectives for Cambridge 2281 (3.7)

The traditional theory of the firm assumes the primary objective is profit maximisation. This means producing at an output level that creates the largest possible gap between total revenue and total cost. The specific rule for this is to produce where Marginal Cost (MC) equals Marginal Revenue (MR). This objective is driven by the firm's owners (shareholders in a public limited company), who seek the highest possible return on their investment through dividends and share price appreciation. While this objective is central to many economic models, its attainment relies on the strong assumption that firms possess accurate knowledge of their cost and revenue functions. In reality, uncertainty and the complexity of modern business can make precise MC=MR calculations difficult.

In large firms, where there is a divorce of ownership from control, managers (agents) may pursue objectives that differ from those of the owners (principals). Managerial theories suggest goals that maximise the managers' own utility. William Baumol proposed sales revenue maximisation, where firms produce at the output where Marginal Revenue (MR) = 0. This is because managers' salaries, prestige, and job security are often tied to the size of the firm's revenue stream. An alternative is sales (volume) maximisation, where the goal is to sell as much as possible without making a loss, producing where Average Cost (AC) = Average Revenue (AR). This focuses on gaining market share and achieving economies of scale, which can also enhance a manager's status.

Behavioural economics offers a more realistic objective known as 'satisficing'. Coined by Herbert Simon, this theory posits that firms are complex coalitions of different stakeholder groups (e.g., managers, shareholders, workers, suppliers). Each group has its own objectives, which often conflict. Instead of maximising a single variable like profit, managers aim to achieve a 'satisfactory' level of performance for all key stakeholders to ensure cooperation and the firm's continued stability. For example, they will target a profit level that is sufficient to keep shareholders content, while also providing adequate wages and job security for employees. This approach acknowledges the cognitive limits of decision-makers and the political realities of running a large organisation, making it a pragmatic compromise.

Corporate Social Responsibility (CSR) has emerged as a significant modern business objective. It involves a firm voluntarily going beyond its legal obligations to consider its impact on society and the environment. This can include adopting ethical sourcing policies, reducing pollution, investing in community projects, and ensuring fair treatment of employees. While these actions may increase costs and reduce short-run profits, they can be strategically beneficial in the long run. A strong CSR record can enhance brand reputation, foster customer loyalty, attract and retain top talent, and mitigate risks from future regulations. It represents a shift from a narrow shareholder focus to a broader stakeholder perspective, aligning business practices with societal values for long-term sustainable success.

The textbook assumption: firms maximise profit = TR − TC.

Rule: produce where MC = MR. This is the output that maximises the gap between TR and TC.

Assumes owners control decisions and have perfect information about costs and revenues.

In large public limited companies, shareholders (owners) want profit max, but managers (agents) may pursue growth, revenue, or satisficing — the principal-agent problem.

Managers may prefer:

• Larger empires (status, salary linked to firm size)
• Job security (avoid risky profit-max strategies)
• Satisficing across multiple stakeholder groups

Corporate social responsibility (CSR) — firms voluntarily adopt environmental, ethical, or community policies. This may raise costs short run (e.g. cleaner production) but can increase demand and brand loyalty long run.

Evaluation: CSR may be genuine commitment or window dressing (marketing). If consumers value ethical behaviour, CSR aligns with profit max long run. If not, it conflicts with shareholder interests.