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1.2.4 Behavioural economics and economic policy

Choice Architecture, Framing and Nudges Steer Behaviour Without Removing Choice

Definition

Nudge: a feature of choice architecture that alters people's behaviour in a predictable way without forbidding any options or significantly changing their economic incentives.

  1. Behavioural insights are used to influence decisions.
  2. Choice architecture is the way choices are presented.
  3. Framing is how wording or context changes a decision.
  4. A nudge steers behaviour without removing freedom of choice.
Note
  • Choice architecture shapes how options are presented.
  • Framing changes decisions through wording or context.
  • A nudge steers choice while preserving freedom.

Choice Architecture, Framing and Nudges Each Shape Decisions Differently

  1. Choice architecture designs the setting of a decision.
  2. The order and default of options can steer choices.
  3. Framing presents the same option in different lights.
  4. A nudge makes the desired choice easier.
Example
  • Placing healthy food at eye level nudges better eating.
  • Saying nine in ten people pay on time frames the norm.
  • Automatic enrolment nudges people to save.

Governments and Firms Use Nudges Because They Are Cheap and Keep Choice Open

  1. Governments have used nudges to raise saving and organ donation.
  2. Firms use framing and defaults in their offers.
  3. Nudges are cheap compared with other tools.
  4. They keep choice open, unlike a ban.
Case study
  • The UK Behavioural Insights Team applied nudges to public policy.
  • Automatic pension enrolment sharply raised participation.
  • But some nudges have only small or short-lived effects.

Nudges Are Low-Cost but Their Effects Vary and Raise Ethical Concerns

  1. For nudges: they are cheap and preserve choice.
  2. Against: effects can be small, and framing can feel manipulative.
  3. There are ethical concerns about steering people.
  4. On balance, nudges can be a useful, low-cost tool, but their effect varies and the ethics of steering choice mean they are not a full substitute for other policy.
Exam technique
  • Define choice architecture, framing and nudges.
  • Give an example of each.
  • Weigh effectiveness against the ethics of steering choice.
Common Mistake
  • Do not confuse a nudge with a mandate or ban.
  • A nudge preserves freedom of choice.

Defaults, Restricted Choice and Mandated Choice Are the Main Choice-Architecture Levers

  1. Choice architecture includes several specific policy levers.
  2. A default choice applies if the consumer does nothing.
  3. Restricted choice limits the number of options to reduce overload.
  4. Mandated choice requires people to make an active decision.
Note
  • A default applies unless the consumer opts out.
  • Restricted choice cuts the number of options.
  • Mandated choice forces an active decision.

Each Lever Changes How the Decision Is Set Up

  1. A default sets the option that applies automatically.
  2. It can be reversed if the consumer wishes.
  3. Restricted choice removes some options to ease overload.
  4. Mandated choice makes people choose rather than drift.
Example
  • Automatic pension enrolment makes saving the default.
  • A shorter menu of options can reduce decision overload.
  • Requiring an organ donation choice is mandated choice.

These Levers Are Cheaper Than Regulation but Often Weaker Than a Tax or Ban

  1. These levers can work alongside taxes and subsidies.
  2. They are often cheaper than regulation.
  3. But they may have weaker effects than a tax or ban.
  4. So they suit some problems better than others.
Case study
  • UK automatic pension enrolment from 2012 sharply raised saving.
  • Few people opted out once enrolled by default.
  • So a default can shift behaviour at low cost.

Choose the Lever to Fit the Problem, Alongside Taxes, Subsidies or Regulation

  1. For defaults: cheap and effective while preserving choice.
  2. Against: restricted choice can remove options people value.
  3. Mandated choice can be resented if the decision is hard.
  4. On balance, these levers can be effective and low-cost, but they work best alongside taxes, subsidies or regulation rather than as a replacement for them.
Exam technique
  • Define default, restricted and mandated choice.
  • Give an example of each.
  • Weigh them against taxes, subsidies or regulation.
Common Mistake
  • Do not treat a default choice as compulsory.
  • It is an easily reversible starting point.
Self review
  • What is choice architecture?
  • What is framing?
  • What is a nudge, and how does it differ from a mandate or ban?
  • Distinguish default, restricted and mandated choice.
  • How do these levers compare with a tax or regulation?
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Traditional economics assumes that consumers are fully rational utility maximizers. This means they perfectly calculate the optimal bundle of goods that maximizes their total utility, UUU, subject to a budget constraint:

I=PxX+PyY I = P_x X + P_y Y I=Px​X+Py​Y

In this traditional model, consumers possess perfect information, infinite time, and complete self-control to make consistent, optimal decisions.

However, real-world consumers face a different reality with limited time and restricted computational ability. Behavioural economics introduces bounded rationality, suggesting that rather than optimizing, consumers often satisfice by choosing an option that is simply good enough.

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Under rational choice, what does a consumer try to maximise?

1.2.4 Behavioural economics and economic policy Revision Guide

  1. A Level
  2. /Economics
  3. /1.2.4 Behavioural economics and economic policy