Natural gas plays important role in the global energy sources, hence understanding its price behavior is important to various economic agents. This study examined whether rational bubbles existed in the three major natural gas markets by employing Fourier unit root tests and a nonparametric rank...

We develop Bayesian techniques for estimation and model comparison in a novel Generalised Stochastic Unit Root (GSTUR) model. This allows us to investigate the presence of a deterministic time trend in economic series, while allowing the degree of persistence to change over time. In particular...

Aufgrund der einzel- und gesamtwirtschaftlichen Relevanz von Zinsänderungen ist das Interesse an Zinsprognosen traditionell sehr groß. Dennoch finden sich in der wissenschaftlichen Literatur nur relativ wenige Studien, welche die Prognosegüte ökonometrischer Verfahren "out of sample"...

In this study, we apply a rolling window approach to wavelet-filtered (denoised) S&P500 returns (2000–2020) to obtain time varying Hurst exponents. We analyse the dynamics of the Hurst exponents by applying statistical tests (e.g., for stationarity, Gaussianity and self-similarity), a...