Spurious Correlation in Aggregate Data Analysis Using Index Variables (pages 102–111)
Keith R. Billingsley, Robert Munzenrider, James E. Prather and Marvin K. Hoffman
http://onlinelibrary.wiley.com/doi/10.1111/j.1747-1346.1973.tb00816.x/abstract
Spurious Correlation in Aggregate Data Analysis Using Index Variables (pages 102–111)
Keith R. Billingsley, Robert Munzenrider, James E. Prather and Marvin K. Hoffman
http://onlinelibrary.wiley.com/doi/10.1111/j.1747-1346.1973.tb00816.x/abstract