=+63. Human Development Index 2012, part 3. In Exercise 23 we saw that the United Nations Development Programme

(UNDP) uses the Human Development Index (HDI) in an attempt to summarize the progress in health, education, and economics of a country with one number. The gross domestic product per capita (GDPPC) attempts to summarize the wealth produced by a country in one number.

Here is a plot of GDPPC against HDI:

0.45 0.60 0.75 0.90 HDI 60,000 40,000 20,000 GDPPC GDPPC is measured in dollars. Incomes and other economic measures tend to be highly right skewed. Taking logs often makes the distribution more unimodal and symmetric. Compare the histogram of GDPPC to the histogram of log(GDPPC).