In addition to looking at personal characteristics such as age and relationship status, the researchers divided the countries into high- and middle-to-low income groups according to average household earnings.
When 26-year-old actress Amber Heard and 36-year-old photographer Tasya van Ree went public with their relationship in 2010, age wasn't at the forefront of reports the way it was for Carey and Cannon.
As described here previously, control of the three primary elements of the business relationship has shifted as the Age of the Seller is being replaced by the Age of the Customer.