Secondary research (also known as desk research) involves the summary, collation and/or synthesis of existing research rather than primary research, where data is collected from, for example, research subjects or experiments.

The term is widely used in market research and in medical research. The principle methodology in medical secondary research is the systematic review, commonly using meta-analytic statistical techniques, although other methods of synthesis, like realist reviews and meta-narrative[1] reviews, have been developed in recent years.

Secondary research can come from either Internal or External sources.

See also

• Meta-analysis
• Primary research
• Market research