An oil cartel effectively increases the price of oil by 100% causing a shock in oil consuming countries A and B. The FED in country A takes immediate action increasing the money supply, while FED in inflationary country B does not take any action. In the long run you would expect that:

The Organization of the Petroleum Exporting Countries (OPEC) is frequently cited as an example of a cartel in the oil and gas sector. The member nations of OPEC do have market impact, albeit it is debatable whether the economic evidence proves it to be a true cartel.

Who controls the supply of oil?

13 of the largest oil-exporting countries in the world make up the cartel known as the Organization of the Petroleum Exporting Countries. In order to control the price on the global market, OPEC seeks to control the oil supply.

Who owns OPEC?

In Baghdad, Iraq, five nations—the Islamic Republic of Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela—signed a document in September 1960 that established the Organization of the Petroleum Exporting Countries (OPEC). They were to become the Organization's founding members.

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