Does anyone know of any psychological studies to prove that people value more the things they had to pay for?

Question

Many thanks!

Answer 1

I don't know of any studies to prove this but as a parent I can say that when a child has to pay for something themselves, they take much better care of it than if it was a freebie. When kids start earning their own money and find out how fast it goes, it does a lot to change their wasteful ways.