New study reveals 7 key factors shaping U.S. economic policies
The article explores how to analyze relationships between many time series using a few dynamic factors in VAR models. It discusses estimating the number of dynamic factors, testing factor restrictions, and identifying structural VARs. The researchers found around 7 dynamic factors in U.S. data, rejected the exact dynamic factor model, but supported an approximate factor model. They also obtained sensible results for a SVAR that identifies monetary policy shocks using timing restrictions.