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Q:  

How do you create county level data using microdata files?

A:  

The following document illustrates how one can use microdata files to produce statistics at the county level.

One uses a PUMA equivalency crosswalk to determine which PUMAs to combine for a county and/or which PUMA to associate with multiple counties.

The example uses Illinois to illustrate the percent boomers by PUMA and the percent boomers by county.

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