I do have to have that four years of someone was invested in that study and it really just comes down to common sense. But sometimes the studies, while pointing out the obvious, do show some answers. How many parents have you seen keep clothing/toys of their children for their grandchildren? I know, in my own family, my SIL had adorable clothes for my niece that she spent a small fortune on and then passed on to my child. There is ten years between the two girls, the clothes were horribly out of style and dd wouldn't wear the, but my SIL had carried those clothes around for ten years, from California to Idaho, and between three no four different houses.
It does make you think.
This is so true. I have some infant clothing I kept for each of the girls, but I'm sure they will never even want them. I did donate all their clothes after about 2 years old. I kind of figured that they'd be out of date.