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Index/Topics/Survey Undercount

Survey Undercount

Adjustments for survey undercount in estimating undocumented population

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3 results
Jan 27, 2026
Most Viewed

How does Pew Research estimate unauthorized immigrants by state and how does that differ from MPI methods?

Both the and the rely on variants of the well‑established “residual” approach—subtracting an estimated lawful foreign‑born population from total foreign‑born counts—but they implement that core idea d...

Feb 3, 2026

How do Pew, DHS, and CMS methods for estimating undocumented populations differ in detail?

All three organizations—, the , and the —derive ‑population totals from variants of the “residual” approach (subtracting measured lawful foreign‑born from survey counts of the foreign‑born and adjusti...

Jan 29, 2026

How do Pew, CMS and MPI differ in methodology when estimating state undocumented populations?

Three leading sets of estimates—, the , and the —all start from the same basic “residual” idea (total foreign‑born in surveys minus estimated legal foreign‑born = likely ), but they diverge in the dat...

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