Recent research has focused on the prevailing relationship between crude oil and natural gas prices. Nowadays, it is well acknowledged that crude oil prices often drive natural gas prices. However, their relationship is unstable over time so that it exhibits regime changes. As a result, crude...

This article scrutinizes the relationship between the U.S. crude oil and natural gas prices. The relationship exhibits regime changes, which depend on technological, economic and geopolitical factors. We find that crude oil and natural gas prices decouple over two periods of about three years...