Xu, Haiyan; Zhang, ZhongXiang - 2011 - The previous version: August 19, 2010, This version: November 17, 2010
Crude oil prices have been fluctuating over time and by a large range. It is the disorganization of oil price series that makes it difficult to deduce the changing trends of oil prices in the middle- and long-terms and predict their price levels in the short-term. Following a price-state...
