Geographical mobility data are used to determine the extent of mobility of the U.S. population and resulting redistribution. Migration data are collected as part of the Annual Social and Economic Supplement (ASEC) to the Current Population Survey (CPS). How populations change has implications for federal, state, and local governments, as well as for private industry. Researchers can identify characteristics of movers from these data and track the mobility of the U.S. population over time. For the purpose of this report, CPS and ASEC are used interchangeably even though the ASEC is a supplement within the CPS survey.
This report examines data based on the 5-year migration question from the March 2010 CPS. Historical migration data derived from the Decennial Census and CPS/ASEC questions on residence 5 years ago are provided and discussed for comparative purposes. The 5-year mobility question asked for information about respondents aged 5 years and over whether they lived in the same house or apartment 5 years ago. This type of question is limited by the fact that it does not capture repeat migration (people who leave a residence and return within the 5-year period) and only captures one move. Moves are commonly classified by type: within the same county, from a different county in the same state, from a different state, or from abroad.