The benefit of a cross-sectional study design is that it will allow comparing many different variables at the same time. We could, for example, look at age, gender, income in relation to the employees efficiency and performance and the way they manage their time, with little or no additional cost. The benefit of a longitudinal study is that researchers are able to detect developments or changes in the characteristics of the target population at both the group and the individual level. The key here is that longitudinal studies extend beyond a single moment in time. As a result, they can establish sequences of
