This paper tests for the presence of output mean and variance nonlinearities in international industrial production and UK and US sectoral production growth rates using ARMA-GQARCH, bilinear (BL) and joint BL-GQARCH models. ARMA-GQARCH models confirm the presence of asymmetric variance effects...

This paper analyses the stylized facts of business cycles in Norway, by comparing different detrending methods. As the choice of the appropriate data transformation depends on the nature of the underlying dynamic properties of the time series, a set of unit root tests are first applied to the...