This paper investigates the presence of the bubbles that are experienced in the global vanilla (VNL) price, using the GSADF approach. The results show that there are five bubbles in the VNL price that are driven by specific reasons. Also, in this regard, the opening and ending points of each...

This paper employs the mixed frequency vector autoregression (MF-VAR) to discuss the causal link between crude oil dependence and military expenditure in China. The empirical results demonstrate that the crude oil dependence Granger causes military expenditure and accounts for 66.8% of the...

This paper investigates the ability of gold to hedge worldwide risks from the perspective of global economic policy uncertainty (GEPU). By applying the full- and sub-sample rolling-window bootstrap causality tests to analyze the dynamic interaction between GEPU and gold price (GP). It can be...