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Immigration Data Users Seminar
Audrey SingerPOPULATION REFERENCE BUREAU
& MIGRATION POLICY INSTITUTE SEMINAROctober 16, 2008
Immigration Data at the Sub-national Level
Where can I find data on immigrants for cities, counties and metro areas?
Is it easy to get?
Is it safe to use? What are the cautions?
Sources of Sub-national Immigration Data
DHS Office of Immigration Statistics: Flow data
Local Area Data: local governments, school districts, community organizations
Census: Decennial, ACS, Pop Estimates
Why use state and local data on immigrants?
Immigrants are more geographically spread out than ever before
Immigrants are settling in smaller areas
Many local areas need data for decision-making
Percent Foreign Born
Percent of foreign born who entered since 2000
30 or above
1.09 - 4.54
4.55 - 12.40
12.41 - 15.91
15.92 - 27.24
U.S. = 12.4
Immigrants living in top 100 metros – 84%
Remainder – 5%
Immigrants living in top 100 counties – 70%
Immigrants living in top 100 cities – 33%
The majority of U.S. immigrants live in US metropolitan areas: 84% in the nation’s 100 largest metro areas
All immigrants – 100%
Immigrants living in all metro areas – 95%
Brookings Census Plus Data Tool SPONSORED BY LIVING CITIES
Provides access to demographic, social, economic, and housing data compiled by the U.S. Census Bureau
Provides comparative rankings through 2006 on over 100 key indicators for the 100 largest U.S. cities, counties, and metro areas, and all 50 states
Can view and download data, compare rankings, across multiple indicators
Immigration Data on Census Plus 11 variables
Foreign-born population share, 2006
Percent change in foreign-born population, 2000-2006
Share of foreign-born population who are naturalized citizens, 2006
Share of foreign-born population entering U.S. in 1990s, 2006
Share of foreign-born population entering U.S. since 2000, 2006
Share of foreign-born population from Mexico and Central America, 2006
Share of foreign-born population from South America, 2006
Share of foreign-born population from Europe, 2006
Share of foreign-born population from Asia, 2006
Share of foreign-born population from Africa, 2006
Share of foreign-born population from Caribbean, 2006
Finding immigration data on Census Plus
http://www.brookings.edu/projects/Living-Cities.aspx
Cautions with using sub-national data
You can’t always get what you want
Sample size of the ACS, margins of error, confidentiality
But if you try, sometimes, you get what you need
How the media uses statistical significance
Poll Finds Obama Gaining Support and McCain Weakened in Bailout Crisis
By ADAM NAGOURNEY and MEGAN THEENEW YORK TIMESPublished: October 1, 2008
The CBS News poll showed that Mr. Obama had a nine-percentage-point lead over Mr. McCain — 49 percent to 40 percent. It is the first time Mr. Obama has held a statistically significant lead over Mr. McCain this year in polls conducted by CBS or joint polls by CBS and The Times.
SAFE
How the media fails to use statistical significance
“Two Northern Virginia counties that took highly publicized stances against illegal immigration saw their number of foreign-born residents decline last year, while one of their neighbors saw its immigration population go up.”
In fact, Loudoun and Prince William’s immigrant population change was not statistically significant. [Fairfax’s increase (6%) was significant, but so was Arlington’s (13%), which was not mentioned in the article.]
UNSAFE
How fact tanks use statistical significance
Trends in Unauthorized Immigration: Undocumented Inflow Now Trails Legal Inflow
By JEFFREY S. PASSEL and D’VERA COHNPEW HISPANIC CENTERPublished: October 2, 2008
There were 11.9 million unauthorized immigrants living in the United States in March, 2008….The size of the unauthorized population appears to have declined since 2007, but this finding is inconclusive because of the margin of error in these estimates.
SAFE
www.brookings.edu/metro
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