Text-term selection and analysis: Frequentist and Bayesian strategies and interpretations
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Economic analysis based on text data has expanded rapidly, yet the ultra-high dimensionality of text data presents substantial challenges for term selection and estimation. We propose the Information-Adaptive Lasso and Information-Adaptive Spike-and-Slab Lasso as novel frequentist and Bayesian approaches to address these challenges. A key theoretical contribution of this study is the establishment of the rate of convergence in term-selection consistency, which we show to be faster than those achieved in the existing Lasso literature. Applying our methods to Federal Open Market Committee (FOMC) statements, we identify and estimate high-impact terms driving fluctuations in monetary policy uncertainty.