D​‌‍‍‍‌‍‌‍‍‍‌‌‌‍‌‌‌‌‌‌​iscuss whether economies of scale have an​‌‍‍‍‌‍‌‍‍‍‌‌‌‍‌‌‌‌‌‌​y relevance to such companies as Wal-Mart​‌‍‍‍‌‍‌‍‍‍‌‌‌‍‌‌‌‌‌‌​.