What is the reliability and validity test for secondary data (time-series data) ?

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Daman Singh

Secondary data were collected by other persons or organizations. its reliability and validity depend upon the reputation of the person or organization. Once you are confident that the secondary source of data is authentic and reputed, it is not necessary to check its reliability and validity. In the case of primary data, there is necessary to check the reliability and validity of questionnaires or data collection tools.

Chuck A Arize

https://www.eajournals.org/wp-content/uploads/An-Assessment-of-the-Reliability-of-Secondary-Data-in-Management-Science-Research.pdf