Published in The Economist. It shows the difference in cost-of-living between 2003 and 2013. However, I see two issues:

• Making index = 100 for New York both in 2003 and 2013 is wrong. The reader will think New York prices stayed flat over 10 years, and it makes all comparisons 2003-2010 for other cites meaningless, as index might not have evolved the same way outside New York.
• The choice of cities listed below is questionable. Why is Mexico City not listed?

Source: http://www.economist.com/blogs/graphicdetail/2014/03/daily-chart-1

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