Menand, Louis (27 November 2005). "Everybody's an Expert". The New Yorker. Retrieved 14 August 2021.
nytimes.com
Kristof, Nicholas (26 March 2009). "Learning how to think". Opinion. The New York Times. Retrieved 6 April 2009. Report on the book Expert Political Judgment by Philip Tetlock, who uses the fox and the hedgehog as a parable for political and economics experts.