Perhaps only 10 percent of the country's poor live in areas of concentrated, long-term poverty.

Certain regions, especially the south and some urban centers, also experienced high rates of concentrated poverty.

The history of the reservation system has resulted in concentrated poverty.

The effects of concentrated poverty are so disruptive to a classroom, witnesses said, that teachers cannot teach effectively.

This 40% threshold became the common definition of "concentrated poverty" in policy and scholarly research.

Several critiques have been raised against this territorial category of "concentrated poverty."

Several recent studies have pointed to the role of "neighboorhood effects" caused by concentrated poverty.

Scholars have also recognized qualitative shifts in areas of "concentrated poverty."

Several scholars have questioned both the success and broader ability of such policy interventions as an adequate response to concentrated poverty.

This cannot be proved now; data on concentrated poverty are provided only by the decennial census.