1.1.2 Economic assumptions
- Syllabus
- 2026
- Topic
- 1.1.2
- Level
- —
Learning objectives
1.1.2a Consumer-benefit and business-profit assumptionsThe underlying assumptions that:• consumers aim to maximise their benefit• businesses aim to maximise their profit.1.1.2b Why consumers may not maximise benefitReasons 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.1.1.2c Why producers may not maximise profitReasons 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.
Start with the maximisation assumptions
Economic models often begin with two simplifying assumptions: consumers aim to maximise their benefit from consumption, while businesses aim to maximise profit. These assumptions predict the objective each decision-maker is trying to achieve; they do not claim that every real decision succeeds.
| Decision-maker | Assumed objective | Meaning in a decision |
|---|---|---|
| consumer | maximise benefit | choose the affordable option expected to provide the greatest satisfaction or usefulness |
| business | maximise profit | choose the output, price or method expected to make the largest difference between total revenue and total cost |
If two affordable products differ in expected usefulness, the consumer assumption predicts selection of the higher-benefit one. If two production plans differ in expected revenue and cost, the business assumption predicts the higher-profit plan.
Benefit is the consumer's gain from consumption, not the firm's profit. Profit is total revenue minus total cost, not simply sales revenue. An assumption is a model starting point, not proof that consumers calculate perfectly or that every business has only one objective.
Explain why consumers depart from benefit maximisation
Consumers may choose an option that gives less benefit because calculation is difficult, habits persist, or other people's behaviour influences the choice. A strong explanation names the cause and traces how it changes the decision.
| Reason | Decision mechanism | Possible result |
|---|---|---|
| poor calculation | the consumer cannot accurately compare all costs, risks and future benefits | an option that looks attractive now may provide lower overall benefit |
| hard-to-give-up habit | repeated behaviour makes switching costly or uncomfortable even when a better option exists | brand loyalty or continued consumption overrides the calculated alternative |
| copying others | social approval, fashion or group behaviour becomes part of the decision | the consumer follows friends or a trend rather than choosing the personally highest-benefit option |
For sugary drinks, a consumer may underestimate long-term health costs, keep buying a familiar brand, or copy friends. Each route can sustain consumption even after the price rises or information suggests another choice would offer greater benefit.
A choice that an observer dislikes is not automatically irrational. To show failure to maximise benefit, explain why the consumer's calculation, habit or social influence leads away from the option that would provide that consumer greater overall benefit.
Trace objectives that can displace profit maximisation
A producer may accept less profit when managers pursue revenue or sales, when the business prioritises customer care, or when it undertakes charitable work. The alternative objective changes the decision criterion, so the most profitable option is not always selected.
| Alternative priority | Likely decision | Why maximum profit may be forgone |
|---|---|---|
| revenue maximisation | seek the greatest sales income, possibly by changing price or output | higher total revenue can come with costs that prevent the largest profit |
| sales maximisation | use discounts or promotion to sell the greatest quantity | lower margins or higher selling costs can reduce profit |
| caring for customers | improve service, quality, access or affordability | extra cost or a lower price may benefit customers while reducing current profit |
| charitable work | donate money, provide free services or charge a subsidised price | resources are directed to a social aim instead of their most profitable use |
If a shop manager offers a bulk discount to increase the number of sales, the manager may meet a sales target even though revenue per unit falls and the owner's profit is not maximised. This also shows how managers and owners can pursue different objectives.
Revenue maximisation, sales maximisation and profit maximisation are distinct: revenue concerns sales income, sales concerns quantity sold, and profit concerns revenue after costs. Customer care or charity can later improve reputation and profit, but the immediate decision can still sacrifice maximum current profit.