# Release of 2009-2013 5yr PUMS **URL:** \ **Category:** USA\ **Created:** [February 9, 2015, 6:21pm UTC](https://forum.ipums.org/t/release-of-2009-2013-5yr-pums/792 "2015-02-09T18:21:00Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Tim\_Moreland](https://avatars.discourse-cdn.com/v4/letter/t/f1d935/32.png) [@Tim\_Moreland](https://forum.ipums.org/u/Tim_Moreland)\ **Post date:** [February 10, 2015, 7:04pm UTC](https://forum.ipums.org/t/release-of-2009-2013-5yr-pums/792/2 "2015-02-10T19:04:00Z")
The IPUMS-USA Project is currently working on improving their data creation process. This will ultimately improve the IPUMS-USA project as a whole, but with the unfortunate side-effect of delaying the release of the 2013 multi-year ACS data files. While there is no current estimated release date for these samples, the multi-year data files are simply a concatenation of the single-year ACS data files; thus, it is possible to construct the multi-year files yourself. You can simply select the 2009, 2010, 2011, 2012, and 2013 1-year ACS datasets from the IPUMS-USA data selection menu, adjust dollar values to the most recent year in the 5-year set (using YEAR and an adjusted [CPI99](https://usa.ipums.org/usa-action/variables/CPI99#description_section) variable), and divide all weight values by 5. While the Census Bureau does use more complex methods for generating multi-year weights (see Weighting Methodology from the [2012 3-year Accuracy Statement](https://usa.ipums.org/usa/resources/codebooks/AccuracyACS_1012.pdf)), simply dividing by five is the primary adjustment and provides extremely similar values to the Census Bureau calculated weights. You can verify this by trying to match the [2009-2013 PUMS Estimates for User Verification](http://www.census.gov/acs/www/data_documentation/pums_documentation/). If you are still uncertain about this combination method, I would recommend replicating your analysis using the combined 2008 to 2012 ACS samples and compare your results with the actual 2012 5-year ACS sample. [MIGPUMA1](https://usa.ipums.org/usa-action/variables/MIGPUMA1#description_section) and [PWPUMA00](https://usa.ipums.org/usa-action/variables/PWPUMA00#description_section) are available in all years from 2009-2013; therefore, you should expect these variables to be included in the 5-year dataset. Keep in mind that PUMA definitions changed to the [2010 codes](https://usa.ipums.org/usa/volii/pumas10.shtml) and definitions starting in 2012 (see this [previous answer](https://forum.ipums.org/t/which-puma-definition-2000-or-2010-is-applied-to-the-2010-12-acs-3-year-file/449/1) for how PUMA variables are handled in multi-year files). MIGPUMA1 and PWPUMA00 are currently available in the 2012 5-year dataset. Hope this helps. --- _[View the full topic](https://forum.ipums.org/t/release-of-2009-2013-5yr-pums/792)._