In "Thinking, Fast and Slow" by Daniel Kahneman, while explaining regression to the mean he writes,

Highly intelligent women tend to marry men who are less intelligent than they are.

is equivalent to the statement

The correlation between the intelligence scores of spouses is less then perfect.

He further clarifies ...

Can you buy wins in baseball? Baseball is well known for having gross discrepancies in team payrolls, Alex Rodriguez of the New York Yankees made more money this year than the entire Houston Astros roster. Intuitively more money should buy better players and result in more wins on average. Let ...