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Learn How to Nudge

Module: Module 3 — Strategy & Senior LeadershipCode: LNFaculty: Prof. Shruti TewariSessions: 2Status: ✅ Drafted

Big idea​

Prof. Shruti Tewari's frame on nudge starts from Richard Thaler & Cass Sunstein's Nudge (2008): a nudge is any aspect of the choice architecture that alters people's behaviour in a predictable way without forbidding any options or significantly changing their economic incentives. The intellectual basis is that humans are not the rational economic agents of textbook theory — they are predictably biased, present-biased, status-quo-biased, and influenced by how choices are presented. Libertarian paternalism says we can design the choice environment to make the better-for-the-chooser option the default, while preserving freedom to opt out. The UK Behavioural Insights Team ('Nudge Unit') formalised the practical playbook with the EAST framework: make the desired behaviour Easy, Attractive, Social, Timely. Defaults are the most powerful single nudge (organ donation: opt-in countries 15%, opt-out countries 90%+).

Key concepts​

  • Choice architecture. Every choice presentation is a design (default, order, framing, salience, friction). There is no neutral design. Designers choose, deliberately or not, what behaviour their architecture makes likeliest.
  • Nudge — definition (Thaler & Sunstein). Any aspect of choice architecture that alters behaviour in a predictable way without forbidding any options and without significantly changing economic incentives. Freedom of choice preserved.
  • Defaults — the single most powerful nudge. Organ donation: opt-in countries (US, UK, Germany historically) ~15% consent; opt-out (Austria, France, Spain) ~90%+. Retirement savings: opt-out enrolment lifts participation from ~50% to ~90% (Madrian-Shea; embedded in the US Pension Protection Act 2006).
  • EAST framework (UK BIT). Easy (reduce friction; pre-fill forms; default the desired option), Attractive (use attention-grabbing visuals; personalise), Social (show what most others do; commitment with peers), Timely (intervene at the moment of choice; not before, not after).
  • Indian applications. Swachh Bharat Mission used social nudges (community-led total sanitation; visible markers of toilet-using households). Income Tax Department uses social-norm letters ("9 out of 10 people in your area pay their taxes on time") with measured 5–10% compliance lift. UPI default-acceptance dynamics.
  • Ethics of nudging. Libertarian paternalism (preserve choice while steering toward better-for-chooser default) vs manipulation (exploiting biases against the chooser's interest). Transparency test — would the user accept the nudge if it were disclosed? Nudges for whose benefit, by whose definition.

Self-check​

A health-insurance product has a free annual check-up benefit but only 12% of customers use it. The team is considering: (a) raise premium 5% to fund email reminders, (b) add a financial incentive (₹500 voucher), (c) make the check-up an opt-out feature (auto-booked at the nearest clinic, customer must cancel). Through Thaler-Sunstein + EAST, which is the strongest *nudge* and why?

  • A. Email reminders
  • B. Option (c) — opt-out auto-booking — is the strongest nudge because it leverages the default (the most powerful lever), is Easy (no action required to accept the benefit), Timely (appointment is real and proximate), and preserves choice (customer can cancel). Option (a) is a communication push (weak). Option (b) is a financial incentive, which by Thaler-Sunstein definition is not a nudge — it significantly changes economic incentives
  • C. Financial voucher
  • D. Premium increase
Nudge — the Thaler-Sunstein definition
Any aspect of choice architecture that alters behaviour in a predictable way without forbidding any options and without significantly changing economic incentives. Freedom of choice is preserved — you can opt out — but the default is chosen to be better-for-chooser.

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Continue learning​

🧰BIT · ToolEAST — Four Simple Ways to Apply Behavioural InsightsThe UK Behavioural Insights Team's official EAST paper — the cleanest practical framework for designing nudges into government and product flows.🎥TED · WatchRichard Thaler — Nudging People to SaveThe Nobel laureate's own talk on Save More Tomorrow and the power of defaults — the foundational nudge case study in 15 minutes.📊World Bank · ReferenceWorld Development Report 2015 — Mind, Society, and BehaviorThe World Bank's flagship report applying behavioural science to development — with case studies from health, education, finance and governance across emerging markets.🎧Podcast · ListenNudge Podcast (Phill Agnew)Short, applied behavioural-science episodes — each one a single nudge with the evidence, the mechanism and a worked example. Useful for building intuition.
🪞 Apply it — reflection prompts
  1. Pick one underused feature or benefit at your firm. Run EAST: make it Easy (reduce friction), Attractive (visual or personalised), Social (show what others do), Timely (intervene at the moment of choice). What's the smallest experiment?
  2. Audit one customer or employee workflow for defaults. Which default currently nudges against the user's best interest — and what would you change?
  3. Run a transparency test on the three most influential nudges in your product or service. If each were openly disclosed to the user, would they consent — or feel manipulated?

📝 Going deeper. Richard Thaler & Cass Sunstein, Nudge: The Final Edition (2021) is the canonical reference. The UK Behavioural Insights Team's EAST paper (2014) is the cleanest practical framework. For applied case studies, BIT's annual reports and the World Bank's World Development Report 2015: Mind, Society, and Behavior.