Why is a £100 shirt marked down to £60 worth more than the same shirt originally priced at £60? How does using credit cards influence how much money we spend? Does pre-paying for a holiday make it seem better value? World renowned economist and author Dan Ariely and financial writer and comedian Jeff Kreisler answer these questions and more, exposing our hidden motivations driving our (often misguided and expensive) decisions around money. Fascinating, engaging, funny and essential, Dollars And Senseis a sound investment, providing the tools you need to improve your financial choices, spend smarter and save better. In the increasingly crowded field of popular cognitive science and behavioural economics, Dan writes with an unusual combination of verve and sagacity.