http://www.pewresearch.org/fact-tank/2017/06/26/around-the-world-favorability-of-u-s-and-confidence-in-its-president-decline/
https://www.ucl.ac.uk/european-institute/analysis/2016-17/poulsen-investment-policy
http://website-pace.net/documents/19895/585401/20140625-HandbookPlatformCorruption-EN.pdf/d6bbdea0-f3d4-4160-9e3a-b284bb4d8d95