The contemporary arena provided collectors with extraordinary choices, including a plethora of paintings by today's ''it'' artists, a cabal of young Chinese painters including Liu Ye, Yue Minjun and Chen Zhen.
To roughly calculate, I build on a study of 120 countries by Christine Zhen-Wei Qiang of the World Bank that found that a 10 percent increase in mobile phone penetration correlates with a 0.8 percent average increase in GDP growth.