Secondary data analysis involves the use of previously collected data in a particular research field to study a different research question. Researchers can recycle data from one article or combine data from various studies to create a new, larger sample as well.
Lewis-Beck, M., Bryman, A., & Liao, T. (2004). The SAGE encyclopedia of social science research methods (Vols. 1–3). Thousand Oaks, CA: SAGE Publications. https://doi.org/10.4135/9781412950589
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Methodology