There are more details on this at the author’s website: http://www.woojang.co.uk/
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A lot of people use the term “hockey stick” to describe the global income growth over recent years. Those that don’t usually understand what the hockey stick is and why it is important. In any climate of low income growth, the basic trend line is going to be flat. Why this is so important to a broader debate on climate change remains an open question: the hockey stick graph is the most widely used figure of the social science literature that provides an explanation for the recent long term rise in global average income. It’s also a figure that will be used, frequently, in the debate on climate change.
To begin, a summary of global human development over time can be found at the World Development Indicators webpage. There is a much more useful visualization version of the same data at the World Development Database (www.wddb.org). The chart above, while showing a rather flat global income growth, demonstrates that this flat trend is not entirely a fact of fact. It was created using projections that included both negative population growth and positive human consumption.
The World Development Indicators, or WDI, are a network of metrics developed by the World Bank. The data has been updated in recent decades based on new data collected in 2016. The most recent data shows that population growth has slowed in all parts of the world. The increase in population is the largest factor contributing to overall income growth. This is one of the reasons that global inequality has increased over the last decade: the global economy is not growing as fast as the world population. The other key fact of data shows that global economic inequality is at a record high level since the 1970s. This is another factor that will probably have a long lasting impact on the ability of people to afford both a better life and adequate services.
As an aside, it should be noted that in the first version of the data there were many more indicators included including the percentage of world income going toward goods and services relative to other inputs such as consumption (not measured as of 2016) and land and natural resources. As those data were collected in the 1980’s, they were mostly for use by national statistical offices.
A few other examples of the World Development Indicators are available on a slide show. On the one hand, the top three indicators included the average income per person, number of children, number of women in