Won't you be my neighbor?

I feel like I heard a story or read an article at some point about one factor contributing to happiness being how many people you know that live within a close distance to you. I have tried to google it but can't come up with anything close. The closest related thing is an NPR story I listened to a few years ago about getting to know your neighbors that was quite cute, but not the original story I'm still trying to find. If anyone out there knows what I'm talking about, please send the link.