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The GINI Index of Income Inequality datasets are reported once per year by the United States Census. Through statistical means, the data reflect the income dispersion across a defined boundary. The dataset is available to download through the Urban SDK Data Hub for the years 2015 - 2020. The data has been aggregated to the census tract.

Census GINI Index Definition

The GINI index is a statistical measure, used to explain income inequality. The index calculates a value between 0 -1. GINI values of 0 indicate perfect equality (where the population receives an equal share), to 1, perfect inequality (where only one recipient or group of recipients in the population receives all of the income).

The GINI coefficient is calculated by the mathematical difference between the Lorenz curve (the observed cumulative income distribution) and the notion of perfectly equal income distribution.

GINI Coefficient Categories

Scores range from 0 to 1

  • Zero = perfect equality

  • 1 = perfect inequality

Census GINI Index Parameters: Census.gov

Contents:

Census GINI Index Schema

The dataset is available in JSON, Shapefile, GEOJSON, and CSV file types.

Description

Type

Example

geo_id

14-digit code relating the data to the correct geolocation

String

16981048

census_tract_code

The unique identifier provided by the US Census for each census tract

String

14401

sub_category

GINI Index

String

GINI Index

unit

Arbitrary

String

value

GINI calculation of equality (between 0-1)

Float

0.749

year

Year data was collected

String

2019

county_name

Name of the county that the census tract resides in

String

Duval

state_name

Name of the state that the census tract resides in

String

Florida

geometry

The GIS information required for the computer to read the mapping file

String

MULTILINESTRING ((-81.59791 30.24124, -81.59801 30.24135))

Detailed Calculations

geo_id

The “GEO.ID” field contains 14-digit codes that identify the summary level of data, the geographic component of the data, and FIPS codes that uniquely identify the data. For example, the 14-digit “GEO.ID” for Harris County, TX is “0500000US48201” where “050” represents the summary level of the data, “0000” represents the 2-digit geographic variant, and the 2-digit geographic component, “US” represents the United States, “48” represents the state of Texas and “201” represents Harris County.

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