This paper extends the GARCH model to a wide class of nonstationary processes by proposing a semiparametric GARCH model for simultaneous modelling of conditional heteroskedasticity, slow scale change and periodicity in the volatility of high-frequency financial returns. A data-driven algorithm...

We focus on discussing the impact of China's accession to WTO and the financial crisis on China's exports to Germany, particularly in agricultural products, based on some most recent proposals. Firstly, structural breaks caused by those events are detected. Then the Box–Cox model and a new...

This paper focuses on a systematic quantitative discussion of the short- and long-term impact of remarkable economic events on international trade in a two-stage framework. Firstly, procedures based on dummy variables are proposed to detect structural breaks, types and sizes of jumps caused by...