|  | Data Year |  |  | |
---|---|---|---|---|---|
Measure | Data Source | Wave I | Wave III | Geographic Area2 | Variable description |
Street connectivity (Alpha index) | ESRI StreetMap | 19993 | 20033 | 1 k | Ratio of observed to maximum possible route alternatives between nodes (intersections); high values indicate high street connectivity. |
Pay facilities availability (count per 10,000 population) | Dun and Bradstreet | 1995 | 2001 | 3 k | Number of pay facilities per 10,000 population (population count from Census, see below). Includes Instruction (e.g., dance studios, basketball instruction, martial arts), Member (e.g., athletic club and gymnasium, tennis club, basketball club), and Public fee (e.g., physical fitness facilities, bicycle rental, public golf courses) facilities identified by 8-digit Standard Industrial Code. |
Public facilities availability (count per 10,000 population) | Dun and Bradstreet | 1995 | 2001 | 3 k | Number of public facilities per 10,000 population (population count from Census, see below). e.g., public beach, pools, tennis courts, recreation centers identified by 8-digit Standard Industrial Code. |
Landscape diversity (Simpson's diversity index) | National land cover dataset | 1992 | 2001 | 1 k | Represents the probability that any two pixels selected at random are different patch types. |
Population count | U.S. Census | 1990 | 2000 | 3 k | Count of persons within buffer, calculated by averaging census block-group population counts, weighted according to the proportion of block-group area captured within 3 k |
Median household income | U.S. Census | 1990 | 2000 | CT | Median household income. Wave I values were inflated to 2000 dollars using the Consumer Price Index. |
Crime rate | Uniform Crime Reporting data | 1995 | 2001 | Co | Number of non-violent and violent crimes per 100,000 population (provided in source dataset; buffer-based population counts listed above were not used to calculate crime rate) |