Appendix C: Thirty-four Other Series Classified by Economic Process: Timing Characteristics for Peaks and Troughs Separately

Geoffrey H. Moore and Julius Shiskin, Indicators of Business Expansions and Contractions (NBER, 1967), chap. 8, https://www.nber.org/books-and-chapters/indicators-business-expansions-and-contractions/appendix-c-thirty-four-other-series-classified-economic-process-timing-characteristics-peaks-and.