Can you shop your way to happiness?

‘That Smeg fridge expresses something about who you want to be. So you buy it’Sometimes it’s nice to learn that a psychological phenomenon has a name, if only so I no longer have to think of it as Me Being Uniquely Irrational And Self-Defeating. So it is with the Diderot effect – which, I learned recently (via Lifehacker), is the term for when you buy something new, but then it makes your other possessions look timeworn by comparison, so you end up replacing them, to