COI 2.0 component indicators - Z-scores

This variable is equal to 1 if the census tract is located in one of the 100 largest metro areas (as of 2015), zero if located in a metro- or micropolitan area that does not belong to the 100 largest metro areas, and blank if it is located outside a metro- or micropolitan area.

Ratio of students enrolled in at least one AP course to the number of 11th and 12th graders, transformed to z-scores.

Percentage adults ages 25 and over with a college degree or higher, transformed to z-scores.

Percentage 18-24 year-olds enrolled in college within 25-mile radius, transformed to z-scores.

Percentage 3- and 4-year-olds enrolled in nursery school, preschool or kindergarten, transformed to z-scores.

Percentage ninth graders graduating from high school on time, transformed to z-scores.

Percentage third graders scoring proficient on standardized math tests, converted to NAEP scale score points, transformed to z-scores.

Percentage third graders scoring proficient on standardized reading tests, converted to NAEP scale score points, transformed to z-scores.

Percentage students in elementary schools eligible for free or reduced-price lunches, transformed to z-scores and multiplied by -1.

Percentage teachers in their first and second year, transformed to z-scores and multiplied by -1.

Number of ECE centers within a 5-mile radius, converted to natural log units, transformed to z-scores.

Number of NAEYC accredited centers within a 5-mile radius, converted to natural log units, transformed to z-scores.

Percentage households without a car located further than a half-mile from the nearest supermarket, transformed to z-scores and multiplied by -1.

Percentage impenetrable surface areas such as rooftops, roads or parking lots, transformed to z-scores and multiplied by -1.

Summer days with maximum temperature above 90F, transformed to z-scores and multiplied by -1.

Percentage individuals ages 0-64 with health insurance coverage, transformed to z-scores.

Mean estimated 8-hour average ozone concentration, transformed to z-scores and multiplied by -1.

Mean estimated microparticle (PM2.5) concentration, transformed to z-scores and multiplied by -1.

Percentage housing units that are vacant, transformed to z-scores and multiplied by -1.

EPA Walkability Index, transformed to z-scores.

Average number of Superfund sites within a 2-mile radius, converted to natural log units, transformed to z-scores and multiplied by -1.

Index of toxic chemicals released by industrial facilities, converted to natural log units, transformed to z-scores and multiplied by -1.

Percentage adults ages 25-54 who are employed, transformed to z-scores.

Percentage workers commuting more than one hour one way, transformed to z-scores and multiplied by -1.

Percentage family households that are single-parent headed, transformed to z-scores and multiplied by -1.

Economic resource index, combines poverty rate, public assistance rate, homeownership rate, high skill employment, and median household income, transformed to z-scores.