I used $53 a barrel for the 2015 average.
Shale oil production can be suspended and reactivated on short notice and will act as a floodgate against cartel pricing of oil. Its (shale oil's) production cost being the new floor price of oil.
Shale oil's price of production will go down with better efficiencies. Some OPEC and other world producers can operate at $40 a barrel -- most cannot.
