We propose a test for identification of nonlinear serial dependence in time series against the 15 general "null" of linearity, in contrast to the more widely examined null of "independence." The approach is based on a combination of an entropy dependence metric, possessing many desirable...

Nonconstancy of the bispectrum of a time series has been taken as a measure of non-Gaussianity and nonlinear serial dependence in a stochastic process by Subba Rao and Gabr (1980) and by Hinich (1982), leading to Hinich's statistical test of the null hypothesis of a linear generating mechanism...

The problem of identifying the direction of the short-term trend (nonstationary mean) of seasonally adjusted series contaminated by high levels of variability has become of relevant interest in recent years. In fact, major financial and economic changes of global character have introduced a...