10/90 gap
n.— «This disparity has been called the “10/90 gap,” a term coined after a commission in 1990 provided research showing that only approximately 10 percent of the resources spent on health research go to the problems afflicting 90 percent of the world’s population.» —“Health conference tackles ‘10/90 gap’” by Michael O’Boyle Herald (Mexico City, Mexico) Nov. 15, 2004. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...