Behavioural Economics: A Very Short Introduction

Citation

Baddeley, M. (2017). Behavioural Economics: A Very Short Introduction. Oxford University Press. Very Short Introductions.

Chapter Summary

The book has nine chapters on about 126 pages of main text. Chapters 1–7 build up the main ideas of behavioural economics from the individual outwards: what the field is, what motivates people, how others influence them, how they judge, how they handle risk and time, and how personality and emotion enter. Chapters 8 and 9 apply these ideas to the macroeconomy and to public policy.

Chapter 1: Economics and behaviour

A short opening chapter (seven pages) explains why behavioural economics attracts attention and how it differs from conventional economics: it brings in psychology, sociology, neuroscience and evolutionary biology without necessarily giving up economics' analytical power. It introduces bounded, ecological and selective rationality and the kinds of evidence the field relies on, including experiments, neuroscientific data, natural experiments and randomized controlled trials.

Chapter 2: Motivation and incentives

The chapter starts from incentives, the core of economic analysis, and divides motivations into intrinsic and extrinsic, showing how external rewards can crowd out intrinsic motivation. It also covers pro-social choices and image motivation, particularly in charitable giving, and efficiency wage theory as a case where economic and social-psychological influences combine to determine effort at work.

Chapter 3: Social lives

This chapter turns to social influences: aversion to unequal outcomes (in its disadvantageous and advantageous forms), trust and reciprocity, social learning, herding and peer pressure, and social norms. It connects these to cooperation and to the problem of free-riding.

Chapter 4: Quick thinking

Under information and choice overload people rely on quick rules. The chapter presents the heuristics studied by Daniel Kahneman and Amos Tversky (availability, representativeness, and anchoring and adjustment) and the biases they can produce, while noting that heuristics often work well.

Chapter 5: Risky choices

Starting from expected utility theory, the conventional way of quantifying risk, the chapter presents the Allais and Ellsberg paradoxes and the certainty, reflection and isolation effects that any theory of decision-making should explain. It then sets out Kahneman and Tversky's prospect theory and alternatives to it, including Richard Thaler's mental accounting and Graham Loomes and Robert Sugden's regret theory.

Chapter 6: Taking time

The subject is choice over time: present bias, the preference for smaller immediate rewards over larger delayed ones, and the time inconsistency behind it. The chapter discusses the conflict between patient and impatient selves, pre-commitment and self-control, and behavioural life-cycle models built on choice bracketing, framing and mental accounting.

Chapter 7: Personalities, moods, and emotions

The chapter explains how personality, measured by the five-factor OCEAN tests, shapes cognitive skills and economic and financial choices. It then asks whether emotions are irrational or can complement reason, covering the affect heuristic, the somatic marker hypothesis, dual-system models and neuroeconomics.

Chapter 8: Behaviour in the macroeconomy

Behavioural macroeconomics faces the difficulty of aggregating very different people, heuristics and biases. The chapter shows how optimism, pessimism, confidence and social mood help explain macroeconomic fluctuations, and closes with happiness and well-being. Roger Frantz's review notes that it discusses the behavioural macro theories of Keynes, Katona and Minsky and the idea of animal spirits.

Chapter 9: Economic behaviour and public policy

The last chapter covers behavioural public policy, mostly microeconomic: instead of correcting market failures, it aims to change everyday decisions by nudging people towards better choices. It ends by arguing that policies based on behavioural insights should complement rather than replace conventional economic instruments.

Key Concepts

Chapters 1–3: Foundations, motivation and social influence

• Bounded rationality: the idea that decision-makers face limits on information and cognitive capacity, alongside the related notions of ecological and selective rationality.
• Motivational crowding out: external rewards dampening the intrinsic motivation to do something.
• Inequity aversion: disliking unequal outcomes, whether one is behind (disadvantageous) or ahead (advantageous).
• Social norms and herding: shared rules and the tendency to follow others, reinforced by peer pressure.

Chapters 4–6: Judgement, risk and time

• Heuristics and biases: quick decision rules such as availability, representativeness and anchoring, and the systematic errors they can cause.
• Prospect theory: Kahneman and Tversky's alternative to expected utility theory, designed to account for effects such as certainty and reflection.
• Mental accounting: Thaler's account of how people sort money into separate categories, used both for risk and for life-cycle choices.
• Present bias: a disproportionate preference for immediate rewards, producing time-inconsistent choices and a demand for pre-commitment.

Chapters 7–9: Emotion, the macroeconomy and policy

• Affect heuristic: letting emotions guide decisions, discussed with dual-system models and the somatic marker hypothesis.
• Animal spirits and confidence: psychological and social forces that help explain swings in the macroeconomy.
• Nudging: changing how choices are presented to steer behaviour without removing options.

Critical Analysis

Strengths

• Wide coverage beyond the usual heuristics. Besides heuristics, risk and time, the book gives full chapters to motivation, social influence, personality and emotion, and macroeconomics. Barton Edgerton's review for the LSE Review of Books (May 2017) found it refreshing that Kahneman and Tversky appear only a third of the way in and do not dominate, so that the field comes across as the work of many contributors.
• Concepts tied to evidence. The same review credits the author with weaving theoretical concepts together with experimental evidence, especially in the chapters on risk, and calls the book a valuable introduction for a curious reader with little background.
• A balanced conclusion. According to both the chapter abstract and Edgerton's review, the book ends by recommending that behavioural policy complement conventional economics rather than replace it, which gives a measured framing for a field often presented as overturning economics.

Limitations

• Dense for its length. Roger Frantz, reviewing it for undergraduate teaching in the Journal of Behavioral Economics for Policy (2019), judged its level of analysis higher than many undergraduates can manage, with ideas such as the two types of inequity aversion explained too briefly, while finding it accessible for master's students. Edgerton likewise found the seven-page first chapter too quick for readers without some background in economics or social science.
• Not enough on its own for a course. Frantz notes that about 148 pages cannot carry a full semester and need supporting readings.
• No formal models. As a Very Short Introduction it describes theories such as prospect theory and present bias in words; students who need to use the models will need a textbook.

Where It Fits in the Course

This is the compact conceptual overview in the behavioural economics list. Richard Thaler's Misbehaving is the other general-reader book, but it is a first-person history of how the field developed; Baddeley's book is organised by topic and is the quicker way to see the field's structure. Reading Baddeley first and Thaler second works well: the first supplies the map, the second the story and the experiments behind it.

For course work, Edward Cartwright's Behavioral Economics and Wilkinson and Klaes's An Introduction to Behavioral Economics are undergraduate textbooks that present the models alongside the evidence for the same themes (heuristics, risk, time, social preferences, policy). Baddeley's chapters map closely onto their structure and can serve as a preview of each topic. Sanjit Dhami's The Foundations of Behavioral Economic Analysis and the collection Advances in Behavioral Economics edited by Camerer, Loewenstein and Rabin are graduate-level and research-level resources for later study.

How to Use This Book

The book suits economics students meeting behavioural economics for the first time, psychology and policy students who want the economist's view, and general readers. No prior economics or psychology is formally required, but Chapter 1 moves fast; readers new to economics may want to read it twice, or return to it after Chapter 4.

A suggested plan:

• Core (Chapters 1, 4, 5, 6): rationality, heuristics, risk and time are the topics every textbook covers, and these chapters prepare directly for them. Read Chapter 5 slowly; the paradoxes and effects it lists are the standard test cases for prospect theory.
• Broadening (Chapters 2, 3, 7): motivation, social preferences and emotion. They are especially useful for students in labour, public or health economics, or in psychology.
• Applications (Chapters 8–9): read Chapter 9 alongside any course unit on nudges, and use its closing argument on complementing conventional policy as a discussion point.

The book can be read in a few sittings. For each chapter, look up the key experiments it mentions, as Edgerton found himself doing, and then follow the topic into a textbook chapter, where the formal version of the same idea is developed.