Methods
How CrimeDB compiles records, what its words mean, and the files behind every figure. FBI crime data from 1960, Census population, and federal sentencing records are loaded and built into CrimeDB's series. No insight shows figures from them yet: insights show the questions, the method, and the sources that will answer them.
How we compile
Every source goes through six layers: the files as fetched, each source parsed as published, every source side by side in one vocabulary, CrimeDB's chosen series, our models, and what we publish. Pages read only the last layer.
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Each release will ship the answer tables behind the insights, with the source named on every row.
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The facts are free to use, with credit. CrimeDB data may not be used to decide anyone's eligibility for a job, housing, credit, or insurance. Full terms: Terms and reuse.
Definitions
- Robbery
- Taking property from a person by force or threat. Distinct from burglary and from theft without force.
- Reported crime
- Incidents agencies submitted to TIBRS or the FBI. Not the same as victimization. The NCVS estimates the unreported share.
- Rate per 100,000
- Incidents divided by ACS population, times 100,000. ZIP rates use ZIP Code Tabulation Area population, not city limits.
- Known offender
- An offender on an incident report with a recorded race. Unknown stays its own row. This is not a conviction.
- Victimization
- The rate at which people in a group are harmed, from the NCVS. Published one trait at a time, nationally.
- Propensity (on trial)
- Published offending rates for age, sex, and race, multiplied together. Not a trained score, and not a prediction about any person. Shown only on the Risk model while we test whether people read it correctly.