IMD World Competitiveness Yearbook 2018: 

https://www.imd.org/wcc/world-competitiveness-center-rankings/world-competitiveness-ranking-2018/

Michigan State University: GlobalEDGE Reference Desk: 

https://globaledge.msu.edu/

The WEF Global Competitiveness Report: 

https://www.weforum.org/reports/the-global-competitiveness-report-2017-2018

Other resources include: 

IMF: www.imf.org/external/data.htm 

OECD: https://data.oecd.org 

UNCTAD: http://unctad.org/en/Pages/Home.aspx 

WTO: www.wto.org 

UK Data Service: http://ukdataservice.ac.uk/about-us.aspx 

UKTI: https://www.gov.uk/government/organisations/uk-trade-investment

USA Export help: http://www.export.gov

CIA: https://www.cia.gov/library/publications/the-world-factbook/index.html 

World Bank: http://info.worldbank.org/governance/wgi/index.aspx#home  

WEF: https://www.weforum.org/reports/the-global-risks-report-2018