1 “...Previous sharp oil price declines have been accompanied by elevated ex post volatility. In contrast...”

2 “... coincide with the two post-World War II supercycles. By contrast, the permanent component of annual...”

3 “...It is becoming increasingly apparent that the post-2004, across-the-board, commodity price...”

4 “...The 2006-08 commodity price boom was one of the longest and broadest of the post-World War II...”