1. Companies under "oligopolistic" market structures are interdependent.
An oligopoly refers to a market structure in which a couple of firms dominate. At the point when a market is shared between a couple of firms, it is said to be exceedingly focused. In an Oligopoly market structure, there are a couple of reliant firms rule the market. They are probably going to change their costs as per their competitors. For instance, if Pepsi changes their value or price, Coca-Cola will change their price too.
2. "Collusion" is a secret agreement among companies that may result from this interdependence.
Collusion refers to a secret cooperation or deceitful agreement so as to misdirect others, in spite of the fact that not really illegal, as a conspiracy. A secret agreement between at least two groups to confine open challenge by deceiving or misleading others of their legitimate rights, or to acquire a goal forbidden by law normally by cheating or picking up an unfair market advantage is a case of collusion.