Kim, Chang-Jin, 1960- , Piger, Jeremy M. and Morley, James. "Nonlinearity and the Permanent Effects of Recessions, Working Paper 2002-014E," Working Papers (Federal Reserve Bank of St. Louis) (Revised December 2003). https://fraser.stlouisfed.org/title/9029/item/716154, accessed on October 11, 2026.