Final answer:
A cartel is an example of a price-fixing arrangement in international marketing, with OPEC being a prominent example of nations collaborating to control production and prices of oil.
Step-by-step explanation:
An example of a price-fixing arrangement most directly associated with international marketing is a cartel. Cartels are formal agreements among firms in an oligopoly to act together to control market production, set prices, and thereby maximize their collective profits. One prominent example is the Organization of Petroleum Exporting Countries (OPEC), which consists of nations that agreed to act like a monopoly, holding down oil output and keeping prices high to secure high profits from oil exports. While such agreements might be legally enforceable within a country, international cartels like OPEC exist in a gray area of international law and are not legally enforceable. For instance, if one country decides to cut prices and increase output against the cartel's decisions, other countries cannot legally enforce the original agreement.