[1.1.2] Economic assumptions

Economic Assumptions

Economics is a social science that studies the behaviour of people and organisations. To make analysis manageable, economists rely on simplifying assumptions about how consumers and producers behave. These provide a starting point for economic models, even if real-world behaviour is often more complicated.

Two core assumptions underpin most economic theory:

  • Consumers aim to maximise their benefit (also called utility or satisfaction).
  • Producers aim to maximise their profit.

Consumer Behaviour: Maximising Benefit

The standard assumption is that consumers weigh up the costs and benefits of their options and choose whatever gives them the greatest satisfaction — known as rational behaviour. For example, if two identical products are available at different prices, a rational consumer would buy the cheaper one.

Why Consumers May Not Always Maximise Benefit

  • Poor calculation of benefits: consumers may overestimate the enjoyment of a purchase or underestimate its long-term costs.
  • Habits that are hard to give up: consumers continue buying familiar products out of routine even when better or cheaper alternatives exist.
  • Copying others: consumers imitate the purchasing decisions of friends, celebrities or social media influences — sometimes called herd behaviour — which can lead to spending that does not maximise personal satisfaction.

Producer Behaviour: Maximising Profit

The standard assumption for firms is that they aim to maximise profit — the difference between total revenue and total costs. This drives decisions about what to produce, how much and at what price.

Why Producers May Not Always Maximise Profit

  • Revenue maximisation: managers may focus on increasing total sales revenue rather than profit, particularly where managers (not owners) make decisions and are rewarded on sales targets.
  • Sales maximisation: some firms aim to maximise units sold — for example, to gain market share — even at the expense of profit margins.
  • Prioritising customers: some businesses, particularly small independent firms, make decisions that prioritise customer satisfaction over profit.
  • Charitable work: some producers donate profits to charity or invest in sustainable practices at extra cost, both of which reduce profit.
Key Distinction: profit maximisation is most reliable for large shareholder-owned firms where owners directly control decisions. Where hired managers run the business, the goals of managers and owners may diverge — a concept known as the principal-agent problem.

 Key Takeaways

  • Economists assume consumers maximise benefit and producers maximise profit.
  • Consumers may fail to maximise benefit due to poor calculation, habits or copying others.
  • Producers may pursue revenue maximisation, sales maximisation, customer care or charitable goals instead of profit.
  • In large firms, managers may have different objectives from owners, leading to non-profit-maximising behaviour.
a) The underlying assumptions that: • consumers aim to maximise their benefit • businesses aim to maximise their profit. b) Reasons why consumers may not maximise their benefit: • consumers are not always good at calculating their benefits • consumers have habits that are hard to give up • consumers sometimes copy others' behaviour. c) Reasons why producers may not maximise their profit: • producers may have managers that revenue maximise or sales maximise • producers may prioritise caring for customers • producers may complete charitable work.