Federal Reserve Bank of San Francisco. "Discussion of From Many Series, One Cycle: Improved Estimates of the Business Cycle from a Multivariate Unobserved Components Model [Presentation]" in Structural and Cyclical Elements in Macroeconomics, March 16, 2012 (March 16, 2012). https://fraser.stlouisfed.org/title/9966/item/735608, accessed on September 1, 2026.