Arezki, Rabah; Hadri, Kaddour; Loungani, Prakash; Rao, Yao - 2013
secular trend and the short run volatility. To do so, we employ 25 series, some of them starting as far back as 1650 and … investigating the dynamics of the volatility of the 25 relative primary commodity prices also allowing for endogenous multiple … breaks. We describe the often time-varying volatility in commodity prices and show that it has increased in recent years …