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Variables Details
: (EM-878)
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EM Identity and Description
| EM-878 | |
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Document Author
variable.detail.emDocumentAuthorHelp
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Branas, C. C., R. A. Cheney, J. M. MacDonald, V. W. Tam, T. D. Jackson, and T. R. Ten Havey |
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Document Year
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2011 |
Variable General Info
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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Variable ID
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20792 |
| Not reported | |
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Qualitative-Quantitative
variable.detail.continuousCategoricalHelp
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Quantitative (Cardinal Only) |
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Cardinal-Ordinal
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Cardinal |
| No. mi.^-2 |
Variable Typology
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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Predictor-Intermediate-Response
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Predictor |
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Predictor Variable Type
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Time- or Space-varying Variable |
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Response Variable Type
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Not applicable |
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Data Source/Type
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Map or database (e.g., wide coverage, wide availability, measured or modeled) |
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Variable Classification Hierarchy
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3. Human Demographic Data |
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--Employment and occupation |
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Variable Spatial Characteristics
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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Spatial Extent Area
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100-1000 km^2 |
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Spatially Distributed?
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Yes |
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Observations Spatially Patterned?
variable.detail.regularSpGrainHelp
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Yes |
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Spatial Grain Type
variable.detail.spGrainTypeHelp
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other (specify), for irregular (e.g., stream reach, lake basin) |
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Spatial Grain Size
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Census block group |
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Spatial Density
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Not applicable |
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EnviroAtlas URL
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Total Employment |
Variable Temporal Characteristics
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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Temporal Extent
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1998-2008 |
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Temporally Distributed?
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Yes |
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Regular Temporal Grain?
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Yes |
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Temporal Grain Size Value
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1 |
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Temporal Grain Size Units
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year |
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Temporal Density
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Not applicable |
Variable Values
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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| Not reported | |
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Min Value
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Not reported |
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Max Value
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Not reported |
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Other Value Type
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Median |
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Other Value
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20.14 |
Variable Variability and Sensitivity
Unemployed residents (greened vacant lots) ?Comment:From Geolytics Incorporated (East Brunswick, New Jersey) and the US Census Bureau (Washington, DC), we obtained block group-level estimates of demographic variables for each year of the study. Unemployment was defined in terms of the number of residents aged 16 years or older who were not working. Unemployment at the block group level was partitioned among greened lot and control sites. |
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Variability Expression Given?
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No |
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Variability Metric
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None |
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Variability Value
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None |
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Variability Units
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None |
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Resampling Used?
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Not applicable |
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Variability Expression Used in Modeling?
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Not applicable |
Variable Operational Validation (Response Variables only)
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Variable ID
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Validated?
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Validation Approach (within, between, etc.)
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Validation Quality (Qual/Quant)
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Validation Method (Stat/Deviance)
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Validation Metric
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Validation Value
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Validation Units
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Use of Measured Response Data
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