how do you know....that you know? ....see Webnote 94 in Study Skills!
  13 Indices
  1. CPI (inflation) (3.3-100) (VID 4)
  2. OECD Better Life Index (3.1-88) (VID 3)
  3. Happiness Index (3.1-88) (VID 5)
  4. Happy Planet Index (3.1-88) (4.8-172) (VID 6)
  5. Human Development Index (HDI) (4.8-172) (VID 7)
  6. Multi Dimensional Poverty Index (3.4-108) (VID 8)
  7. Gini Coefficient index (Lorenz Curve) (3.4-106) (VID 9)
  8. Producer Price index (NOT IN SYLLABUS, BUT USEFUL) (VID 14) 
  9. Consumer confidence index      (3.2-90) (3.5-121) (VID 10)
  10. Business confidence index  (3.2-90) (3.5-121) (VID 11)
  11. ​(GII) Gender Inequality Index (4.8-172) (VID 15)
  12. (IHDI) Inequality Adjusted Human Development Index (4.8-172) (VID 16)
  13. (PPP) BIG MAC INDEX  (3.1-85) (4.5-155) (VID 13)
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VID 12: How to calculate an index?
VID 1: The Great Recession
VID 2: Rich country = Happy Country?
German Unemployment 2010-2017
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What is an index?

In economics an index takes 2 numbers and expresses the change between the 2 numbers in percentage terms.

​An index takes original data e.g. basket price of goods in an economy and expresses this original data as the base year. (This is equal to 100.) The new price for the Basket  is then used to calculate a percentage change. Take the  New basket price, subtract the Base Year price and divide this number by the Base year price . This number is then multiplied by 100 to get a percentage change. 
VID 8: MDI (Multi Dimensional Poverty Index)
VID 6: Happy Planet Index
VID 16: World Inequality Index
VID 3: OECD Better Life Index
VID 4: CPI - Consumer Price Index 
VID 5: Happiness Index 
VID 7: HDI (Human Development Index)
VID 11: Business Confidence Index
VID 14: Producer Price Index
VID 13: Big Mac Index
​ VID 9: Gini Coefficient (Index)
VID 10: Consumer Confidence Index
VID 15: Gender Equality Index