ERI Economic Research Institute provides salary survey information to thousands of subscribers, including most of the US Fortune 500 and thousands of other small and medium sized companies. ERI researchers review thousands of salary survey sources (including many of those listed below) as a pay survey analysis service that provides market data via our compensation survey software. Some of our products represent a "census" more than a survey. We mine web sites such as job boards where allowed, lease datasets, study incumbent contributed data, host salary surveys on the web, support old-fashioned paper and pencil surveys, evaluate and collect loan and employment applicant data in the provision of web services, review non-copyrighted and/or leased survey data, trade data and products with other survey organizations, digitize publicly available data, and utilize data from field subject matter job analysts' work. In licensing our online survey patent to ERI Salary Surveys, PAQ Services and others, we have enriched our databases with data collected since 1967. ERI began in the mid-1980s as a research outsource of available salary survey research; we no longer input non-ERI surveys into our databases. The best practice recommended for US DOT contractors is the use of three or more unique sources. The following is a list of salary survey titles and publishers that may be of interest. Please note that ERI does not necessarily endorse or recommend the surveys listed, nor are any of the following necessarily currently published or used in ERI products.