For education and discussion only. Not for commercial use. *U.S. economy follows the Wal-Mart way; Americans We are a Wal-Mart nation. Wal-Mart's influence on the U.S. economy has reached levels not seen by a single company since the 19th-century rise of Standard Oil, economists and historians say. Even if you don't shop at Wal-Mart, the retail powerhouse increasingly is dictating your product choices -- and what you pay -- as its relentless price-cutting helps keep inflation low. Wal-Mart is the top seller of groceries, jewelry and photo processing. It is moving into banking, used-car sales, travel and Internet access. It...