At present, both at European Union and world level, experts are preoccupied to find the best method for the deseasonalisation of a time series that should assure the comparability of statistical data. The present paper follows the line of these researches. In the study, we undertake a comparison...

The purpose of this paper is to study the identification methods of the nature of the seasonal component of a time series. These methods are represented by the verifying tests of the unit root for the models of seasonal autoregressive processes: the HEGY test, the Franses test, etc. In practice,...