Well, Mellie, the idea that children aren't allowed in certain places may be why the US passed a law many years ago (30, maybe?) stating that a landlord can no longer refuse housing to someone with a child. I'm sure there are some exceptions to that rule such as private college housing. I guess if someone pushed it though, the landlord would have to let children in there, too.
And, the people who did the gloomy / happy studies used different criteria, but to me, it was pretty funny to me that they were virtually listed as 'sister' articles.
