This information, when regularly collected and analyzed, will help buyers to understand their supply market, its pricing and other mechanisms. Understanding and applying market information can determine success in purchasing negotiations. Some websites offering information on specific supply markets are listed below. Where no Internet sites exist for a specific supply market, where sites do not identify possible suppliers, or where additional supplier information is required, it is always possible to use country-specific electronic yellow pages or specialized directories that provide contacts, commercial and financial information on the selected supplier.