Shi, Shu-ping; Arora, Vipin - 2011
price data reasonably well; and (ii) Both models show that the probabilities of being in a bubble collapsing state and a … bubble expansion state spike in late-2008/early-2009. This provides some support for the claim by Phillips and Yu (2010) and … Gilbert (2010) that a bubble in oil prices existed for short period in 2008 …