Why private investigators marry elementary school teachers?
One of the well know claims in "The Bell Curve: Intelligence and Class Structure in American Life" by Richard J. Herrnstein and Charles Murray is that human intelligence is substantially influenced by both inherited and environmental factors and is a better predictor of many personal dynamics, including marriage. Their claim is: "smarts are marry with smarts" and as a result the "cognitive elite", are becoming separated from those of average and below-average intelligence.The book created a lot of controversy. Now you can play with another study "who marries whom"
What is your conclusion?