Secondary market research is research that comes from already published, compiled and organized sources. It comprises reports and studies done by government agencies, businesses and trade associations.

Three secondary data sources are: -

Commercial sources: These refer to valuable sources that involve cost factors such as association and subscription fees. Commercial sources include trade associations, publicly traded corporations, research associations.

Public sources: These sources are free and offer useful information. Public authorities include departments of public libraries, government departments.

Educational institutions: These sources are one of the most reliable sources out of all others. The information is collected from schools, colleges, technical institutes and universities. Most of the research is behind a paywall, i.e. you need to pay a subscription fee to get access to a website.