Eurostat: https://ec.europa.eu/eurostat/

Organisation for Economic Co-operation and Development (OECD): https://data.oecd.org/

UNESCO Institute of Statistics: http://data.uis.unesco.org/

United Nations Development Programme, World population prospects: https://population.un.org/wpp/

World Bank, Worldwide governance indicators: http://info.worldbank.org/governance/wgi/#home

World Bank, World development indicators: http://databank.worldbank.org/data/reports.aspx?Code=NY.GDP.MKTP.CD&id=1ff4a498&report_name=Popular-Indicators&populartype=series&ispopular=y#

World Bank, Enterprise surveys: http://www.enterprisesurveys.org/

World Economic Forum, Competitiveness index: http://reports.weforum.org/global-competitiveness-index-2017-2018/competitiveness-rankings/