# IKEA effect wiki: [IKEA effect](https://en.wikipedia.org/wiki/IKEA%20effect) > The **IKEA effect** is a cognitive bias in which consumers place a disproportionately high value on products they partially created. The name refers to Swedish manufacturer and furniture retailer IKEA, which sells many items of furniture that require assembly. > A 2011 study found that subjects were willing to pay 63% more for furniture they had assembled themselves than for equivalent pre-assembled items. ---