... us the parameters, or limitations, of the calculation. Inthis case, there are parameters of time (a singleyear), data span (annual data from 2008–2012),and of place (US). In this book all ... odds are USodds, so we have left the geography off and the data spans are usually evident in the sources cited.Any change to these parameters, as well as the time frame used to collect data, may ... judgment about whether it accuratelyreflects the population under study, as well asassess the methodology of analysis, fairness of presentation of the data, explanations of variablesand limitations,...