Firstly, secondary data (Hair et. al, 2009) may be designed in a biased manner towards the original study purpose. Hence, data will have to be carefully evaluated to determine if it suits the current research purpose: prior data manipulation may render the data unsuitable for present study purposes (i.e. if data had been manipulated to suit the previous research objectives, it renders the data less suitable for use in the current project).
Secondly, data relevancy affects the suitability of secondary data meeting the needs of the current problem. The time frame in which secondary data was collected will affect data relevancy and usability: secondary data not reported in the desired units of measurement could be misleading. Inconsistency in summarizing categories, different or undefined reporting periods, leads to incorrect inferences, as data conversion often is not an option... Read more>>