Immigration data varies widely depending on the research question. If working with a small population or a population defined by characteristics that aren't gathered in the census (religion or child of immigrants, for example), consider looking for researcher-gathered data that intentionally over-samples that group, rather than a nationally representative sample. ICPSR is an excellent source for this. Contact your librarian for more support.
Stock data is used to estimate the number of individuals of a certain population of interest at a specific point in time.
For example: The number of naturalized Colombian immigrants residing in the U.S as of July 2013.
Sources of Stock data
|American Community Survey (ACS)||Replaced the Decennial Census long form in 2000. Since 2007 you can find the ACS with multiyear sampling estimates. More information||2000-Present; every year|
|Decennial Census||Composed of short form (basic) and long form (socio-economic). Long form replaced by ACS in 2010||1850-2010; every ten years||IPUMS Microdata prepared by Dr.Marrow|
|Estimates of the Unauthorized Immigrant Population Resident in the United States: January 2012- Department of Homeland Security (DHS)||Report providing estimates of the size of the unauthorized immigrant population residing in the U.S||2000-2012|
Department of Homeland Security report on 'Estimates of Unauthorized Immigration Population living in the United States: January 2011'.
Flow data is an estimate of change (addition/subtraction) of a population of interest at a specified period of time.
For example: The estimate of the number of persons arriving to the U.S from Vietnam for the years of 1965-1975.
Sources of Flow Data
Yearbook of Immigration Statistics- Department of Homeland Security (DHS)
|Admissions on permanent basis, temporary basis, aylum or refugee status, naturalizations. Replaced the functions of the INS in 2001.||2002-Present; Every fiscal year|
|Statistical Yearbook of the Immigration and Naturalization Service (INS)||Admissions on permanent basis, temporary basis, aylum or refugee status, naturalizations. Pre-DHS.||1996-2001; Every fiscal year||Department of Homeland Security Archives|
|--||[physical copies digitized]||1978,1980-1984,1987, 1995, 1997, 1998||HathiTrust Digital Library|
|--||[microfiche]||1983, 1987-1999||Tisch Library Microform. Sudoc number: J 21.2/10|