Final answer:
Carnival and Royal Caribbean can collude to set prices and act like a monopoly, which involves reducing output and raising prices to maximize profits.
Step-by-step explanation:
In the scenario presented, Carnival and Royal Caribbean have the option to collude and set their prices to maximize joint profits. Collusion would involve agreeing to charge the same price to eliminate competition and act like a monopoly.
When firms collude in such a manner, they tend to reduce output and increase prices to maximize profits, just like a monopolist would. In the context of a payoff matrix, colluding to charge a higher price would typically result in higher joint profits when compared to both firms charging a low price.
For a perfectly competitive firm, the goal is to maximize profit by finding the level of output where total revenue exceeds total costs by the greatest amount, as demonstrated by the provided example of a raspberry farm with revenue and costs data.