David ZataraEngineerData scientistProduct builder

Sources and corrections

How a number gets checked

The habit comes from drill sites: one thin tube of soil speaks for a whole hillside, so you check the sample before you trust the map. Every number David publishes gets the same four questions.

Four questions before trusting any number

Example headline

Visits3 up 40%2

says a new report1

4
  1. 1
    Who counted?

    A census, a survey, or police records?

  2. 2
    Out of how many?

    "Up 40%" means little until you know the starting number.

  3. 3
    Compared to what?

    One group's number only means something next to everyone else's, measured the same way.

  4. 4
    What's left out?

    Every count misses someone. Ask who.

What "checked" means

Every answer names its sources.

On Neighbor Radio, each answer ends with the sources it was checked against, with a link to each one. A number without a source does not go on the page.

Primary first.

Government counts, peer-reviewed research and the institutions a community runs for itself come before news coverage of them. A news story can be the start of a check, never the end of one.

Every answer carries a review date.

Each page says when it was last reviewed. If a source updates its figures, the page gets updated and the date moves.

Free to use, with the original named.

Anyone can use these numbers. Please cite the original source listed with each one, not this site.

Every answer is checked against sources like these

  • Pew Research Center
  • U.S. Census Bureau
  • Congress.gov
  • National Archives
  • Library of Congress
  • Smithsonian
  • CDC
  • National Institute of Mental Health
  • 988 Suicide & Crisis Lifeline
  • Encyclopaedia Britannica
  • Stanford Encyclopedia of Philosophy
  • Harvard Pluralism Project
  • Sefaria
  • My Jewish Learning
  • Quran.com
  • Hindu American Foundation
  • Sikh Coalition
  • National Congress of American Indians

Found a mistake?

Email the page link and what's wrong. David reads every message. A confirmed error is fixed on the page, the source is updated, and the review date moves, so anyone can see what changed.

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