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Status:Closed    Asked:Jan 30, 2015 - 06:43 PM

2012 ACS 5-Year Migration

Hello,


I am working with the 2012 ACS 5-Year Migration estimates. Specifically, the variable of interest for me is MIGPUMA1 and I have two questions. First, why do values of MIGPUMA1 cover more than one state in the MIGPLAC1 variable if PUMAs do not cross state lines? Second, there seem to be some values of MIGPUMA1 (such as 100) that do not appear in the conversion file puma_migpuma1_pwpuma00.xls. I am confused about what those values represent.


Thank you for your help!

 
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Staff Answer

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Tim_Moreland

Staff

While PUMAs do not cross state lines in the ACS samples, PUMA values are state-dependent. In other words, a unique MIGPUMA1 cannot be identified without also knowing its state value (MIGPLAC1). In 2012, Alabama, Colorado, Idaho, New Jersey, New Mexico, and Oklahoma all contain MIGPUMA1's with a value of 190. In order to differentiate between these PUMAs, you must also use MIGPLAC1.


MIGPUMA1=100 does appear in the conversion file as a value of '00100' in Column D.


Hope this helps.

 

Feb 02, 2015 - 03:35 PM

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