They used PPP for the GDP per person comparison (but not for the GDP)
They are not trying to say Qatar is generally comparable to Uttar Pradesh, just pointing out that it has the same nominal GDP. This can be interpreted in any number of ways but that is all that the chart claims to show.
And of course they did a similar thing with United States and China:
They are not trying to say Qatar is generally comparable to Uttar Pradesh, just pointing out that it has the same nominal GDP. This can be interpreted in any number of ways but that is all that the chart claims to show.
And of course they did a similar thing with United States and China:
http://www.economist.com/blogs/dailychart/2011/01/comparing_...
http://www.economist.com/content/chinese_equivalents