How Has Elderly Migration Changed in the Twenty-First Century? What the Data Can-and Cannot-Tell Us.

Interstate elderly migration has strong implications for state tax policies and health care systems, yet little is known about how it has changed in the twenty-first century. Its relative rarity requires a large data set with which to construct reliable measures, and the replacement of the U.S.

"Going with the flow"--a comparison of interstate elderly migration during 1970-2000 using the (I)PUMS versus full census data.

Objectives: We investigate how much state-to-state elderly migration patterns have changed during 1970-2000 and compare the findings from 2 commonly used sources of data, the census flow tabulations and the integrated public use microdata series (IPUMS).

Methods: We calculate descriptive statistics such as migration rates, the distribution of top destination and origin states, and a new migration Herfindahl-Hirschman Index that measures geographic concentration. Comparisons over time and between data sources are formalized using correlations and regression analyses that permit persistent flow patterns.