Data Center Energy Efficiency - A report by Invest Sweden on the good conditions for building energy efficient datacenters in Sweden. 

Datacenter risk index - Cushman Wakefield's report which is an international comparison and risk analysis on different countries.

The 2011 Census - an excerpt from the yearly study on datacenters by Datacenter Dynamics.

Projecting annual new datacenter construction market size - a report from Microsoft that try to estimate the growth of datacenters in the coming decade.