2. Purchasing Power Parity (PPP). This is a comparative measure of the cost of goods in different countries. It is often applied to a ‘basket of goods’. The basket of goods contains a group of basic goods and services that are needed, and the comparison is often made between the numbers of hours needed to work to make enough income to buy this ‘basket of goods’ in different countries.

3. Gross Domestic Product (GDP). This is the value of all goods and services produced within a country, usually over one year. It is often calculated as the sum of consumption + investment + government spending + exports – imports.

4. Gross Domestic Product per person (GDP per capita). This is a more useful measure to Geographers, and is the GDP of a country divided by the total population. It is often used as a measure of the relative income of people within different countries.

5. Gross National Income per person (GNI per capita). This is now used more frequently and has similar comparative values to GDP per capita and the now infrequently used GNP per capita.

6. Physical Quality of Life Index (PQLI). This is an attempt to measure the comparative quality of life in different countries. It is an index calculated from the literacy rate, infant mortality rate and life expectancy. Each is given an equal weighting and the PQLI is shown on a 100 point scale.

7. World’s richest countries 1Luxembourg $36,400 2USA$36,200 3Bermuda$33,000 4San Marino$32,000 5Switzerland$28,600 6Norway$27,700 7Monaco$27,000 8Singapore$26,500 9Denmark$25,500 10Belgium$25,500

8. World’s poorest countries 1SierraLeone$550 2Tanzania$550 3Ethiopia$560 4Somalia$600 5Cambodia$710 6Congo (Democratic Rep)$710 7Rwanda$720 8Comoros$725 9Burundi$730 10Eritrea$750

9. World Map GDP per capita

10. World map of human life expectancy, 2005

11. Average daily food intake in calories per person

12. World literacy rates

13. Relative numbers of millionaires and billionaires in each continent

18. How much money do you think the world’s top 100 billionaires earn, compared to the world’s poorest 100 countries? How many US dollars do you think each earn? per second?

31. The world’s top 100 billionaires earn $9000 per second. The world’s poorest 100 countries earn $4000 per second. During 2006 the world’s 100 poorest countries total wealth (GDP) grew by 7.3%. The world’s top 100 billionaires’ wealth grew by 24.7%.

32. Look at the maps on the following pages to compare how wealth (GDP) has changed across the world from year 1500 to the present.

33. 1500

34. 1900

35. 1960

36. 1990

37. 2002

38. 2015

39. Population in 2000