How it is calculated
The HPI reflects the average years of happy life produced by a given society, nation or group of nations, per unit of planetary resources consumed. Put another way, it represents the efficiency with which countries convert the earth’s finite resources into well-being experienced by their citizens.
The Global HPI incorporates three separate indicators: ecological footprint, life-satisfaction and life expectancy.
Conceptually, it is straight forward and intuitive:
| HPI = | Life satisfaction x Life expectancy
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x ß |
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Ecological Footprint + α |
(For details of how alpha and beta are calculated, see the appendix in the full Happy Planet Index report)