USA: Categorial Economic Policy Uncertainty Index, National Security (NSA)

The Categorical Economic Policy Uncertainty (EPU) Indexes include a range of sub-indexes based solely on news data. These are derived using results from the Access World News database of over 2,000 US newspapers. Each sub-index requires economic, uncertainty, and policy terms as well as a set of categorical policy terms. For instance, articles that fulfil to requirements to be coded as EPU and also contain the term \'terrorism\' would be included in the National Security uncertainty sub-index.Each categorical series is multiplicatively normalized to have a mean of 100 from 1985-2010.A full list of terms (Categorical Term List) can be found at: https://www.policyuncertainty.com/categorical_terms.html.