“We are at price levels where we can see an impact on demand and we have the risk of more shale coming” from rival producers in the U.S., said Olivier Jakob, managing director at Petromatrix GmbH in Zug, Switzerland. “That raises the likelihood the cuts would have to go on longer.”

Link to article: https://www.bloomberg.com/news/articles/2018-01-22/in-extending-alliance-oil-s-big-two-seek-orderly-exit-from-cuts