Even when employees use project management methodologies (PMMs), the question regarding the nature of their use remains, i.e. are they using PMMs in a dedicated manner? While empirical research states that the usefulness of a methodology is the single most important determinant of its acceptance and use by actual users, studies have not examined which methodology use outcomes are more important...

Vaccine efficacy and effectiveness (VE) are generally measured as 1 minus some measure of relative risk (RR) in the vaccinated group compared with the unvaccinated group (VE = 1 - RR). In designing a study to evaluate vaccination, the type of effect and the question of interest determine the appropriate choice of comparison population and parameter. Possible questions of interest include that o...