"An extreme example is that of British egg prices in the early sixties. The eggs were produced almost entirely by battery hens, who had no idea of the season as they existed in a closely controlled, stable environment, and, thus, production could be made steady throughout the year. The egg prices were fixed by the Egg Marketing Board, who, on being asked why the prices contained a strong seasonal element, replied that "the housewives expect it." The seasonal in egg prices vanished soon after the enquiry was made."
- Seasonality: Causation, Interpretation, and Implications, pg. 34
by Clive W. J. Granger
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