When two or more retail outlets are under a common ownership it is called a retail chain. For example: One of a number of retail stores under the same ownership and dealing in the same merchandise. It is called chain retailing.
Chain Stores are groups of retail stores engaged in the same general field of business that operate under the same ownership or management, chain stores are retail outlets owned by one firm and spread nationwide. For example, Van Heusen, Food world, Shopper’s stop etc.