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Our research and our online services are based mainly on
well established,high quality,large sample household surveys
conducted by the Bureau of the Census and several other organizations
that provide survey microdata in the public domain. We also make extensive
use of the Census Bureau's state and national population estimates
and projections and the Bureau of Economic Analysis's personal income series for
states and metropolitan areas.
One very valuable data source that is not well known
is the Internal Revenue Service's Statistics of Income sample of federal tax
returns. This data source allows analysis of virtually all tax form items based on a
sample of about 50,000 tax returns. The file is released annually. We have
had conducted extensive research using these files.
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