Which index is described as a composite measure of life expectancy, education, and income?

• A. Human Development Index
• B. Gross Domestic Product
• C. Gini Coefficient
• D. Big Mac Index

Answer: (A)

Composite measures that blend multiple human development factors into a single number are designed to reflect overall well-being, not just wealth. The Human Development Index is the best example of this approach because it combines three dimensions: health, education, and standard of living.

It uses life expectancy at birth as a health indicator, education accounted for by both mean years of schooling for adults and expected years of schooling for children, and income per person to reflect standard of living (measured in a way that makes international comparisons fair). These components are normalized and then combined to form a single score that summarizes a country’s level of development.

This differs from GDP, which measures only the total economic output, not health or education. It also differs from the Gini coefficient, which measures inequality rather than overall development, and from the Big Mac Index, which is a playful price comparison and not a broad development metric. The Human Development Index uniquely captures life expectancy, education, and income in one composite measure.