The Wall Street Journal:
Three ways to value gold. Three conclusions
5 March 2017
Then three economics and finance professors—Scott Baker of Northwestern University, Nick Bloom of Stanford University and Steven Davis of the University of Chicago—created a series of Economic Policy Uncertainty, or EPU, indexes. And sure enough, according to Prof. Harvey, gold shows a modest historical correlation with the global version of the EPU.
Related publications
'Measuring Economic Policy Uncertainty', Scott R. Baker, Nicholas Bloom, Steven J. Davis, The Quarterly Journal of Economics, Vol 131, Issue 4, November 2016