Can be computed for local, state, national or international level. Approximations Use Ward's Business Directory of U.S. Private and Public Companies. Find the sales figure for that company's product. Calculate the total sales figure for the SIC code for the product for all companies. An annual compilation of reported market share data on companies, products, and services.
Information is taken from trade publications and newspapers.
Magazine and Newspaper Articles Market shares are often reported in newspaper and magazine articles or in the summaries of newspaper and magazine articles. Lists advertising costs for newspapers, magazines, journals, radio stations, television stations, and cable stations. A web sites section includes links to web sites for media groups such as magazines, newspapers, news services, TV and radio stations, and TV and cable networks which include advertising rates. Web site links are also included for advertising industry associations and ad agencies. Users must register to access this information, much of which is available free of charge.