Poisson Regression
Definition
A regression model for count outcomes, such as burglaries per ward per month, that assumes the variance of the counts equals their mean and uses an offset term to convert predictions into a rate per unit of exposure.
Related terms
- Crime Rate
- The number of recorded offences of a given type divided by the population at risk, usually per 100,000 people, which allows comparison...
- Ecological Fallacy
- The error of applying a statistical association observed at the population or group level to an individual, without verifying that the individual...
- Interrupted Time-Series Design
- A design that compares the trend in a crime series before and after an identified intervention date, testing for a change in...
- Negative Binomial Regression
- A count regression model that adds a dispersion parameter to absorb overdispersion, the pattern where a crime count's variance exceeds its mean,...
- Trend Index
- A rate rebased to 100 in a chosen base year so that later years can be read directly as a percentage change...