In a Sweezy oligopoly, the profit-maximizing level of output occurs where mr=mc.
Paul M. Sweezy created the oligopoly's kinked demand curve in 1939. The model explains how oligopolistic groups behave rather than placing emphasis on how price-output determination occurs.
With an equilibrium output of Q units and an equilibrium price of P, the oligopolist maximizes profits by equating marginal income with marginal cost.
Due to each company's desire to maximize profits, there is frequently intense competition among them when it comes to pricing, production, and promotion. 
The main distinction between a monopolist and a perfectly competitive firm is that although for a monopolist, marginal revenue is not equal to the price since changes in output quantity affect the price.
To learn more about monopolists refer to:
brainly.com/question/14055453
#SPJ4
 
        
             
        
        
        
Answer:
the answer is the first sentence and the last 
Explanation:
 
        
             
        
        
        
Answer:
external secondary data
Explanation:
Secondary data is information collected by other people or other sources. The most common secondary data sources are national censuses, sales reports, economic reports, etc. 
This type of data is very useful because it can help us to reduce the costs of a marketing research or other types of studies. A lot of information can be found on the internet, but you must try to use only the information that comes from reliable sources.