The following websites provide tools and resources about business forecasting.

• Forecasting Principles (http://morris.wharton.upenn.edu/forecast). This site, which boasts the ability to provide "the accumulated wisdom of the ages about forecasting methods," offers many valuable resources including links to data sources for economic, demographic, and corporate statistics. The site also defines, discusses, and demonstrates popular forecasting techniques.
  
  
• Bizstats.com (http://www.bizstats.com/). Bizstats provides a wealth of business statistics and industry analyses. The site supplies statistics about business performance at national and industry levels. The site also presents up-to-date industry averages for balance sheets and income statements for companies of various sizes. The site includes an interactive benchmarking tool that allows companies to compare their financial performance to other firms in their industry at comparable sales levels.
  
  
• Beyond Technology (http://www.beyondtechnology.com/profile_shellcheops.shtml). Beyond Technology offers advanced instructions and guidance about how to use Excel in sales forecasting. The tips include formulas and examples for using Excel to conduct and solve routine problems as well as sophisticated forecasting analysis. The website includes a detailed example of how these tools were used to help well-known clients such as Shell Oil.