Oligopoly having identical products is known as Pure oligopoly.

In an oligopoly market structure, a few large firms dominate the market. These firms have significant market power and can influence market prices and affect competition. Oligopoly can be differentiated or pure depending on the nature of the products offered by the firms. When the firms in an oligopoly market offer identical products, it is referred to as a pure oligopoly.

Characteristics of Pure Oligopoly:
- Few sellers: In a pure oligopoly, there are only a few dominant sellers in the market who control a substantial portion of the market share. These firms often have a significant influence on market prices and can impact the overall market conditions.

- Identical products: One of the key characteristics of a pure oligopoly is that the firms offer identical products. This means that the products are homogeneous, with no differentiation in terms of quality, features, or branding. As a result, consumers perceive these products as perfect substitutes for each other.

- Interdependence: Firms in a pure oligopoly are highly interdependent on each other. Any decision made by one firm, such as price changes or product launches, can have a significant impact on the market and the strategies of other firms. This interdependence leads to strategic behavior and competition among the firms.

- Barriers to entry: Pure oligopoly markets often have high barriers to entry, making it difficult for new firms to enter and compete. These barriers can include economies of scale, high initial investment requirements, and established brand loyalty. The existing firms in the market benefit from limited competition, allowing them to maintain their market dominance.

- Non-price competition: Due to the identical nature of the products, firms in a pure oligopoly often engage in non-price competition to gain a competitive edge. This can include advertising, product differentiation through packaging or branding, customer service, and innovation.

- Price rigidity: In a pure oligopoly, firms may exhibit price rigidity, meaning that they are hesitant to change prices frequently. This is because any price change by one firm can trigger a reaction from other firms, leading to a price war and reduced profitability for all. As a result, prices in a pure oligopoly tend to be relatively stable.

Overall, a pure oligopoly with identical products is characterized by a few dominant firms offering homogeneous products, high interdependence, barriers to entry, non-price competition, and price rigidity.