Wal-Mart WMT is perhaps the most salient example of a company benefiting from economies of scale, and for good reason. As a dominant player in retailing, the company's size provides it with enormous efficiencies that it uses to keep costs low. For example, its size allows Wal-Mart to do its own purchasing more efficiently since it has roughly 5,000 large stores worldwide. This gives the company tremendous bargaining power with its suppliers.