Where the words come from
The definition of rationality and of behavioural economics, loss aversion and its size, self-control and automatic enrolment, mental accounting and its two examples, and the view that behaviour called irrational is predictable — Principles of Economics 2e, OpenStax, licensed CC BY 4.0. https://openstax.org/books/principles-economics-2e/pages/6-3-behavioral-economics-an-alternative-framework-for-consumer-choice. Changes: dollar sums converted to pounds at the same figures, including the found-money and credit-card figures; the credit-card case restated in the check as the annual interest paid and lost, with no rates; "fast food restaurant" to "behind a counter"; "overpay on taxes" and "locks for their refrigerators" dropped; the automatic-enrolment evidence kept as United States evidence; the 1979 date 2e gives for the 2.25 estimate dropped, because that estimate comes from Tversky and Kahneman's later work; "complete self control" given the UK specification's name, bounded self-control; the recap's bounded rationality and its closing judgement on which choices the model fits are ours, not 2e's; British spelling.
The objection that people do not act like the model, the answer that a skilled player does not calculate and the physics is still right, and analysis as a first approximation — Principles of Economics 2e, OpenStax, licensed CC BY 4.0. https://openstax.org/books/principles-economics-2e/pages/2-3-confronting-objections-to-the-economic-approach. Changes: the basketball bounce-pass put as a football long pass; "shopping mall" to "the shops"; the US Congress example dropped; British spelling.
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