Which PUMA definition does the 2010 5-year ACS use? The 2000 Census or the 2010? Thank you in advance.
In the IPUMS USA 2010 5-year sample PUMA codes correspond to the 2000 census boundaries with one exception in Louisiana. Due to population displacement following Hurricane Katrina, three PUMA’s (01801, 01802, and 01905) are combined into code 77777 for the 2006-onward ACS. This information along with additional information about the variable PUMA can be found here.