How many industries industries are currently controlled by cartels? Maybe OPEC in oil and DeBeers in diamonds. But even in those cases, the cartels still have

How many industries industries are currently controlled by cartels? Maybe OPEC in oil and DeBeers in diamonds. But even in those cases, the cartels still have limited overall effects. OPEC has trouble policing its members, and DeBeers has competition. Why do you think that lithium producers will be able to form a cartel, when almost no one else can?