Source: Baker, Scott R.
Source: Bloom, Nick
Source: Davis, Stephen J.
Release: Economic Policy Uncertainty
For additional details, including an analysis of the performance of the model, see Baker, Scott, Nicholas Bloom and Steven Davis (2012), "Measuring Economic Policy Uncertainty"
Baker, Scott R., Bloom, Nick and Davis, Stephen J., Economic Policy Uncertainty Index for Spain [SPEPUINDXM], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/SPEPUINDXM, July 5, 2020.