- The New York Times
- The Economist Magazine
- The Globe and Mail | G&M Report on Business
- Canadian Broadcasting Corporation | CBC B.C. | CBC Radio
- Astronomy Magazine
- Science Magazine
- Nature Magazine
- Pacific Exchange Rate Service
- The Centre for International Data at UC Davis (Rob Feesntra)
- Penn World Tables 6.2
- World Bank: World Development Indicators Online
- Trade, Production and Protection 1976-2004 database by Allesandro Nicita and Marcelo Olarreaga
- World Resources Institute: EarthTrends