viii, 88 p. : ill. A print copy of this title is available through the UO Libraries. Search the library catalog for the location and call number. / In recent years, researchers have taken a particular interest in the spatial concentration of poverty due to evidence suggesting that people liVing within certain densities of poverty are more likely to experience certain problems or what have become known as neighborhood effects. This analysis is a quantitative study, focused on describing changes in poverty concentration between 1990 and 2000 in United States metropolitan areas. The study reports changes seen at the commonly used 40% poverty concentration threshold between 1990 and 2000, while at the same time considering other concentration thresholds and how changing the threshold by which we evaluate poverty informs the general trends policy makers receive information about when changes in poverty occur. / Committee in Charge: Neil Bania, Ph.D., Chair; Jessica Greene, Ph.D.; Jean Stockard, Ph.D.