The only child of Italian-American parents, Ray Dalio was born in Jackson Heights, Queens, in 1949.

NEWYORKER: Mastering the Machine

When John started preschool, Ms. Rudnicki says she got "deer-in-headlights looks" from other parents and teachers because her son was the only child with allergies.

WSJ: Finding Food Allergy Allies

Young urban couples, many of them without siblings, will find themselves with four parents to look after and will themselves have only one child (known as the 4-2-1 phenomenon).

ECONOMIST: The consequences of an ageing population

Many parents are viewing off-campus housing options as something that could not only provide a home for their child, but also be an investment that could appreciate in value for resale after graduation or provide a place for their own future retirement.

FORBES: Real Estate Speculation In College Towns