The market structure differs due to various reasons in the economy. For instance, they differ due to the number of firms in the market. Some structures have a higher number of firms, while others have fewer or even a single firm in the market. Secondly, they differ due to the barriers of entry and exit in the market. For instance, some market structure have free entry and exit, while others are highly restricted to mitigate competition.

There are various examples of market structure in the economy. For instance, in the perfect competition, there are many firms and buyers in the market. Moreover, there are no barriers to entry and exit in the market. Secondly, in an oligopoly market structure, there are fewer firms that offer products to many buyers. The firms determine the price of the products jointly to ensure they compete fairly. Thirdly, is the monopoly market where there is only a single firm supplying the products to many all the consumers in the market. And lastly is the monopolistic market where there is freedom of entry, but each firm differentiates the products.