Hamori, Shigeyuki; Tokihisa, Akira - In: International Journal of Business and Economics 1 (2002) 1, pp. 79-86
This paper performs seasonal integration tests based on stock price indices for the G7 countries. Nonseasonal unit roots were found in all countries. This implies that the (1-B) filter is all that is needed to obtain the stationarity of stock prices, and the inclusion of dummy variables is all...