On the 9th October 2017, Richard Thaler was named as the Nobel Prize winner for economics. Thaler is a 72-year-old American economist and a professor of sciences and economics at the University of Chicago. He received the Nobel Prize for his impressive and extensive contributions to behavioural economics. As a leader in his field, Thaler also served as the President of the American Economic association back in 2015. The purpose of this eBook is to explore Thaler’s renowned ‘nudge theory’ in relation to economics. We hope you find the insights useful.