It says that the campaign, targeted at well-educated executives between 25 to 50 years of age, made people curious and got them to think – exactly what the Economist tries to do.
The Economist and how it interpreted India
The Inspiration Room blog has a good piece looking at how The Economist got people in India talking with its 'Interpret the World"' last year, which helped boost subscriptions by 44% in the sub continent.