Seasonality and Unemployment in Ireland. Quarterly Economic Commentary, October 1975

Dowling, Brendan R. (1975) Seasonality and Unemployment in Ireland. Quarterly Economic Commentary, October 1975. [Working Paper]

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Abstract

It is widely known that many statistical series exhibit a distinct seasonal pattern. That is, they tend to rise or fall according to the time of the year even when the underlying levels of the series are constant. Such seasonal movements are often a reflection of variations in the climate-ice-cream sales peak in the summer and coal-sales peak in the winter-or of traditional holiday periods. Obviously we would wish to remove the seasonal variation in order to examine the underlying trend of any given economic' series. If we do not correct data for seasonality it becomes quite difficult to distinguish between movements which reflect the normal seasonal pattern and other underlying movements.

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