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Availability of "all-states" QWIPU convenience files

We have occasionally heard from users who wish to download QWIPU files for all states in a convenient "package". While tabulations based on these files may suffer from selection bias for early years due varying levels of availability of historical QWI across states (see this graph for an illustration), and we suggest users use the [...]

Update for prototype national QWI data through 2008Q4

The prototype national QWI data series developed and maintained by John Abowd and Lars Vilhuber have been updated with the R2009Q4 QWI data release by the Census Bureau, and now go through [...]