This detailed listing of 10.5 million businesses offers the ability to search by company name, type of business, where it's located, size, and more. If you'd like to find out, for example, how many coffee shops are within a 5-mile radius of Augsburg's address, this is the place for you. (Answer at this writing: 120.)
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Sponsored by the American Economic Association, this is a great one-stop shop for anything related to economics, such as links to data and other useful sites. Search or browse the site's contents. There's also an Economic Search Engine of over 23,000 economics web sites.