Browsing The Economic and Social Review, Vol. 27, No. 2, January, 1996 by Subject "Unit roots"
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A visual test for a unit root: Geary's count of sign changes revisited
(Economic & Social StudiesDublin, 1996)Prompted by Geary's (1970) suggestion in a different context, the stationarity of a plotted time series can be assessed by simply counting the number of times the plot crosses the trend line linking the first and last ...