State-Level Data on

Income Inequality

1963 - 2003


This web page contains state-level time-series data on individual and family income inequality in the U.S. from 1963 to 2003. We have computed measures of income inequality at the state and national level using the following datasets:

1) The March Current Population Survey (CPS) from 1963 to 2003. These data were supplied by Unicon.

2) The CPS Merged Outgoing Rotation Group (MORG) survey from 1979 to 2000. These data were supplied by the National Bureau of Economic Research.

3) The U.S. Census in 1970, 1980, 1990 and 2000 based on 1% samples. These data were downloaded from the University of Minnesota Population Center's Integrated Public Use Microdata Series website.

The datasets available here include two measures of earnings inequality: 1) the ratio of the 90th income percentile to the 10th percentile; and 2) the gini coefficient. They also contain information on income deciles, mean earnings, maximum and minimum values, standard deviations and sample sizes. Each dataset contains this information for all respondents and for men and women separately.

For the March CPS survey, data on four measures of income are available: total annual family income, total annual individual income, annual individual wage and salary income and weekly individual wage and salary income. For each of these measures, we provide two datasets: one contains smoothed data and the other contains the raw, unsmoothed data. We recommend use of the smoothed data. Similar measures of income are available for the Census data. For the CPS MORG survey, data on weekly wage & salary earnings as well as hourly wages are available. The Census and MORG datasets are not smoothed. All datasets can be downloaded as either space-delimited ASCII text files or STATA (release 7) data files. Reading the accompanying documentation files before using the data is strongly recommended.

These data were prepared by Joshua Guetzkow, Bruce Western, and Jake Rosenfeld for the Russell Sage program on the Social Dimensions of Inequality. Direct all inquiries to Josh Guetzkow at guetzkow@email.arizona.edu.

 

                     
DESCRIPTION
DOWNLOADS


       
ASCII DATA (.txt)
 
STATA DATA (.dta)
 
DOCUMENTATION
TOTAL ANNUAL FAMILY INCOME
CPS MARCH
Smoothed Data
Raw Data

CENSUS

TOTAL ANNUAL INDIVIDUAL INCOME
CPS MARCH
Smoothed Data
income_smooth.txt MarchIncomeInfo.txt
Raw Data
 
  CENSUS
 

ANNUAL INDIVIDUAL WAGE & SALARY INCOME
 
  CPS MARCH              
   
Smoothed Data
     
   
Raw Data
     
 
 
  CENSUS
 

WEEKLY INDIVIDUAL WAGE & SALARY INCOME
 
  CPS MARCH              
   
Smoothed Data
     
Raw Data
 
CENSUS

CPS MORG

HOURLY INDIVIDUAL WAGE INCOME
  CPS MORG

Last Updated: September 26, 2007