Retail chains and imports from developing countries have grown sharply over the past 25 years. Wal-Marts chain, which currently accounts for 10% of U.S. imports from China, grew 10-fold and its sales 90-fold over this period, while U.S. imports from China increased 30-fold. We relate these...

Retail chains and the volume of imports of consumer goods from developing countries have grown sharply over the past 25 years. Wal-Marts sales, which currently account for 15% of U.S. imports of consumer goods from China, grew 90-fold over this period, while U.S. imports from China increased...

We offer a theory for the complementarity between the size of a retail chain and the scope of its business to explain the growth of general-merchandise firms and the expansion of the "superstore" format. The complementarity results from an interaction of the retailer's economies of scale and...