This paper attempts to describe the relationship between the percent of population uniques on a microdata file from a specific geographic region and the size of the geographic region. In most cases, when a geographic region is enlarged, the percent of individuals or households in that region which are unique decreases. This is because some of the individuals or households which are added to the region when the region is enlarged have the same combination of key variables as those individuals or households which were unique in the smaller region.

Others in Series

WORKING PAPER | DECEMBER 1990

Children and Welfare: Patterns of Multiple Program Participation

This study uses data from the Survey of Income and Program Participation (SIPP) to address these research gaps by analyzing the dynamics of participation.

WORKING PAPER | DECEMBER 1990

Aiding Respondents in the Dating of Longitudinal Processes

In 1983 the Bureau of the Census initiated the SIPP, a survey designed to measure the economic and social changes in persons lives over time.

WORKING PAPER | DECEMBER 1990

The Medicaid Program on Welfare Participation and Labor Supply

The outline of the paper is as follows. In the next section we briefly lay out the background of the Medicaid program.

Related Information

Survey of Income and Program Participation Working Papers