Whatever decision OPEC reaches on oil output at its meeting this week is likely … OPEC’s struggle to balance oil supply and demand globally is exposing economic fault lines around the world. The Organization of the Petroleum Exporting Countries heads into a highly anticipated meeting this week facing a difficult dynamic: Cutting oil production could open the door for other producers, including in the U.S., to ramp up their output at the expense of OPEC members. Failing to cut output could keep oil markets oversupplied, potentially knocking prices down and hurting some already troubled OPEC members. Either outcome is set to shape the path of the global economy and markets that remain deeply sensitive to movements in oil prices. The oil cartel is negotiating oil-output cuts not only from its 14 member nations but also from a host of producing countries outside the cartel including Russia, Kazakhstan and Brazil. […]