Rational or irrational consumers

There is an essential case study here with useful links: http://qualifications.pearson.com/content/dam/pdf/A%20Level/economics-a/2015/teaching-materials/Rational-or-irrational-consumers-Theme-1.pdf

Also try Q4 and 5 from Gillespie: http://global.oup.com/uk/orc/busecon/economics/gillespie_econ3e/student/mcqs/ch03/

Tutor2u powerpoint on Behavioural Economics: http://www.tutor2u.net/economics/blog/what-you-need-to-know-if-you-are-teaching-behavioural-economics-for-the-first-time

Answer Q5 a and b http://qualifications.pearson.com/content/dam/pdf/A%20Level/economics-a/2015/specification-and-sample-assessment-materials/Economics_AS_Collated_SAM.pdf