Harris, David; Kew, Hsein - In: Journal of Time Series Analysis 35 (2014) 3, pp. 203-217
type="main" xml:id="jtsa12059-abs-0001" <title type="main">Abstract</title>We propose extensions of the Box–Pierce ([Box GE, 1970]) portmanteau autocorrelation test to allow for two generalizations: (i) time series that exhibit unconditional heteroskedasticity and (ii) to test for the presence of autocorrelation only...