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December 1994

Seasonality: economic data and model estimation

Ted Jaditz

Seasonality is a pattern that more or less repeats itself each year, although this pattern may drift or change in amplitude over time. The study of seasonality also is linked to the study of business cycles. This article explores the question of what seasonality is, examining the impact of weather, predictable and regular calendar events, and social conventions on seasonal variations in data.

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