Rauterberg & Talley (2017) develop a data set of “corporate opportunity waivers” (COWs) — significant contractual modifications of fiduciary duties — sampled from SEC filings. Part of their analysis utilizes a machine learning (ML) classifier to extend their data set beyond the...

We model economic policy uncertainty (EPU) in the four largest euro area countries by applying machine learning techniques to news articles. The unsupervised machine learning algorithm used makes it possible to retrieve the individual components of overall EPU endogenously for a wide range of...