$this->bbcode_second_pass_quote('', 'T')he 80/20 rule, also known as the Pareto Principle, is a concept used to describe a highly nonlinear relationship between cause and effect. In other words, a minority of the causes (20%) account for a majority of the results (80%).
The spatial distribution of US oil production follows a version of the 80/20 rule. In this case, we’ll call it the 52/2 rule. 52% of all US oil production (as well as 20% of all US natural gas production) in 2013 came from these 20 counties, which make up only 2% of all producing counties.
http://info.drillinginfo.com/half-us-oi ... -counties/









