Air quality in the South Coast Air Basin of southern California has improved significantly over the past decade, although pollution levels continue to exceed health-based standards on a significant number of days. This study estimates the decline in ozone-related school absences in southern...

This paper reviews and compares two air quality benefit assessments completed for California's South Coast Air Basin in 1989 and 2008. Specifically, we separate the influence of changes in population and air quality from that of newer health concentration-response relationships and changing...