2.4 Critique of the maximizing behaviour of consumers and producers

The rational-choice benchmark assumes consumers are rational, maximize utility and possess perfect information. Behavioural economics asks how real decisions depart systematically from those assumptions.

Rules of thumb simplify choices; anchoring makes an initial value influential; framing changes responses when equivalent options are presented differently; availability bias overweights vivid or recent examples. Imperfect information further weakens informed maximization.

Bounded rationality limits processing, bounded self-control creates conflict between current and long-term preferences, and bounded selfishness allows fairness or concern for others. Identify the specific limit and explain how it changes the predicted choice.

A shopper may treat a crossed-out 'original price' as an anchor and judge the current price as a bargain without comparing alternatives, contradicting perfect-information utility maximization.

Indifference curves and budget-line optimization are not required in this syllabus Objective. A bias is a systematic tendency, not proof that every consumer always makes the same error.

Choice architecture is the way options are organized. Defaults apply unless a person opts out; restricted choices remove some options; mandated choices require an active selection rather than allowing no decision.

Nudge theory uses predictable behavioural responses—such as inertia, salience or framing—to steer choices while normally preserving freedom to choose. The architecture changes the decision context rather than the underlying prices or available information alone.

Identify the target behaviour, the architecture used and whether alternatives remain available; then evaluate effectiveness, transparency, autonomy and distributional effects.

Automatic pension enrolment with an opt-out default can raise participation because inertia favours staying enrolled. Requiring every employee to select yes or no is a mandated choice instead.

A nudge is not automatically a restriction or mandate, and a default does not eliminate choice. Bias definitions belong to Objective 2.4.1; this card focuses on applying behavioural insights.

Businesses may pursue profit maximisation, revenue growth, market share, survival, social or environmental goals; the objective shapes decisions and trade-offs.

Objectives can conflict across time and stakeholders. A firm may accept lower short-run profit to build capacity or meet a social mission.

State the objective, time horizon and constraint before evaluating a decision.

A start-up prioritises survival and cash flow over current profit while building a customer base.

“Businesses maximise profit” is a model assumption, not a universal fact.

Profit maximization selects the output or strategy expected to generate the greatest profit. Alternatives change the decision rule: corporate social responsibility considers social and environmental stakeholders; market-share objectives prioritize sales relative to rivals; satisficing seeks an acceptable rather than maximum outcome under constraints; growth expands scale or reach. A firm can combine objectives, but conflicts require an explicit priority and time horizon.