---
title: "base-rate and per-capita normalization — Definition"
description: "Base-rate and per-capita normalization are statistical adjustments for fair comparisons across groups, crucial for FSOT and competitive exams."
url: "https://modeldiplomat.com/learn/glossary/base-rate-and-per-capita-normalization"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Base-rate and per-capita normalization are statistical adjustments that express raw counts relative to a relevant baseline or population, enabling fair comparison across groups of unequal size.
- What is the base-rate fallacy and who formalized it?
- Why do per-capita figures matter in climate negotiations?
- How does per-capita GDP affect international classification?
- Why can a 95%-accurate test still mislead?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In 2009 the U.S. State Department's reporting cited India's per-capita CO₂ emissions (about 1.5 tonnes) against the U.S. figure (roughly 17 tonnes) to frame differentiated climate obligations during the Copenhagen UNFCCC negotiations.

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