Above is the link to the technical document for COI 3.0-2024, published August 2026. This is the most recent version of the Child Opportunity Index technical document.
Previous versions
Download the technical document for COI 3.0-2023, published in July 2025.
Download the technical document for COI 3.0-2021, published in March 2024.
The technical document for COI 2.0, published in January 2020, can be found on this page.
