LLAW6093B Chap.6 Behavioural Biases and Nudges
Behavioural Biases and Nudges
Why behaviour belongs in a regulation course
The second seminar opens with material on behavioural biases, and the extra reading explains what the findings mean for regulators. Standard models assume people weigh costs and benefits sensibly.
The evidence shows they stick with what they already have, put off small costs even when the later gain is large, respond to how information is framed, notice some costs and overlook others, weigh losses more than equal gains and copy what others appear to do.
What a nudge is, and what it is not
The reading defines a nudge as a low-cost intervention that preserves freedom of choice and is informed by how people actually decide, such as disclosure, a default rule or simplification.
It adds cautions that matter in an answer: biases pull in different directions, so each setting must be studied; markets sometimes correct themselves; officials have biases too; and behavioural evidence can support lighter tools as well as heavier ones.
Disclosure that works
An accurate disclosure can still fail if it is abstract, cluttered or badly framed.
The reading wants information that is concrete, simple, timely and salient, that tells people exactly what to do, and that has been tested before it is imposed.
Its financial examples include notice periods for credit card rate rises, a standard requiring consumer communications to be reasonable rather than merely technically compliant, fee rules that let pension plans be compared, and machine-readable company filings.
Defaults, active choice and misuse
Automatic enrolment raises participation because inertia, implicit endorsement and the reference point all favour staying in.
A default should be the option most people would pick if well informed, and an extreme default does not hold. Where officials lack information or the population is diverse, requiring an active choice may be better. The same mechanisms can be abused, for example by enrolling customers in paid plans they did not notice, which the reading treats as manipulation.
What this chapter covers
- 01
Behavioural findings that matter for regulation
- 02
Inertia, procrastination and defaults
- 03
Framing, salience and hidden costs
- 04
Loss aversion and social influence
- 05
Designing and testing disclosure
- 06
Choosing a default or requiring a choice
- 07
When a nudge becomes manipulation
Worked example · free
Redesign a fee disclosure
- 3Name the findings that explain the problem.
- 3Propose a concrete redesign.
- 2Explain how the redesign should be tested.
Key terms
- Choice Architecture
- The background features of a decision, such as defaults, ordering and presentation, that shape what people choose.
- Nudge
- A low-cost, choice-preserving intervention informed by behavioural evidence, such as a default rule, a disclosure or a simplified form.
- Status Quo Bias
- The tendency to stay with an existing option even when switching would be cheap and beneficial.
- Loss Aversion
- The tendency to weigh a loss more heavily than a gain of the same size, measured from a reference point.
- Active Choosing
- An approach that sets no default and requires each person to make an explicit choice.
- Shrouded Attribute
- A cost, such as an add-on fee, that is less visible than the headline price and so tends to be under-weighted.
Behavioural Biases and Nudges FAQ
What is a nudge in financial regulation?
It is a low-cost, choice-preserving tool based on evidence about how people decide, such as automatic enrolment in a savings plan, a simplified disclosure or a default that can be changed. It steers behaviour without forbidding any option.
Why do defaults have such a strong effect on saving?
Leaving a default takes effort that people postpone, many assume the default was chosen for a good reason, and the default becomes the reference point from which a change feels like a loss. The reading reports that an extreme default does not hold, because people with strong contrary preferences opt out.
Can nudges be manipulative?
Yes. The reading warns that the mechanisms that make defaults effective can be exploited, for example by enrolling customers in a paid plan they did not notice. Automatic enrolment that people cannot see, especially when it works against their long-term interest, crosses into manipulation.
Exam move
Collect three disclosures from products you actually hold and rewrite each one using the reading's rule of thumb. Then ask which behavioural finding your rewrite is relying on. Practising on real documents is quicker than memorising the list.
Working through Behavioural Biases and Nudges in LLAW6093B? Sia is AskSia’s AI Law tutor — ask any LLAW6093B Behavioural Biases and Nudges question and get a clear, step-by-step explanation grounded in how LLAW6093B is taught and assessed. Read this chapter free, then take your hardest questions to Sia.
