Compare places with data
Build a comparison using consistent periods, units, populations and definitions.
Prepare the task
Two numbers are not comparable merely because their labels look alike. Keep the definitions and transformations with the result.
- Precise question and territories
- Original files and documentation
- Intended period and unit
Follow the method
- 1Align scope
Check territorial boundaries, period and covered population. Record definition changes before calculating.
- 2Compare units
Separate totals, rates and per-person measures. Retain the formula and a denominator matching the relevant period.
- 3Present limits
Keep missing values, revisions and download dates identifiable. Explain what remains incomparable instead of inventing a value.
Two towns have very different populations: a total and a per-person value answer different questions; explain the choice instead of mixing them.
Choose the resource for the missing evidence
The directory records identify publishers and link to their official services. Choose by task; inclusion does not guarantee an outcome.
| Task | Resource | Check |
|---|---|---|
| Read a French statistical definition | Insee | Compare the series period and territory. |
| Explore a European series | Eurostat | Read codes, units and methodological notes. |
| Find a dataset and producer | data.gouv.fr | Retain documentation and original file. |
Keep a useful record
Use these fields in your own notes. This page does not collect your documents or personal details.
- Dataset, producer and version
- Territory, period, unit and population
- Formula and denominator used
- Missing values and comparison limits
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If definitions or periods cannot be aligned, disclose the difference and limit the comparison.
Common questions
Does a blank cell mean zero?
No. Check whether it represents missing, inapplicable or another coded value.
Can I use the newest population figure?
Check that it matches the measurement’s period and boundaries.