Statistics for Short-Term Economic Forecasting
    Published Date 
  
  
    Copyright 1961
  
  
    ISBN 0870140930
  
 
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      Copy CitationJulius Shiskin, Business Cycle Indicators, Volume 1 (Princeton University Press, 1961), chap. 18, https://www.nber.org/books-and-chapters/business-cycle-indicators-volume-1/statistics-short-term-economic-forecasting.