Wolff, Rodney C; Barnett, Adrian G - School of Economics and Finance, Business School - 2006
The bispectrum and third-order moment can be viewed as equivalent tools for testing for the presence of nonlinearity in … stationary time series. This is because the bispectrum is the Fourier transform of the third-order moment. An advantage of the … bispectrum is that its estimator comprises terms that are asymptotically independent at distinct bifrequencies under the null …