# Birth date of child 2 derivation

Indicates whether the second child's birthdate was directly sourced or inferred from similar households when direct data was unavailable.

- API name: `birth_date_of_child_2_derivation`
- Category: Demography
- Type · unit: Text
- Individuals with a value: 16.9M (6.5%)
- Latest collection: Jun 1, 2026, refreshed every two months
- How values combine: Read from a single source field.

## Links

- [Catalog page](/catalog/v2/birth_date_of_child_2_derivation)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/birth_date_of_child_2_derivation.json)
- [API reference](/docs/reference/getattribute)