A good article relating to the Human Development Index (HDI) –

https://www.straitstimes.com/singapore/health/singaporeans-life-expectancy-to-reach-854-years-in-2040-third-highest-in-the-world

 See below where to find it in the specification: 

Edexcel spec reference 4.3.1 a) The three dimensions of the Human Development Index (HDI) (education, health and living standards) and how they are measured and combined

 AQA spec reference 4.2.6.5  The main indicators of development, including the Human Development Index (HDI).

OCR spec reference P18  macroeconomic measures such as GDP, the Human Development Index (HDI)