"The effectiveness of any measures taken to address the problems of journalism safety ultimately depends on our ability to understand the complex nature and dynamics of risk to journalists. Mapping the scale of the problem through the systematic collection of data on threats over time is therefore a crucial step toward establishing an empirical evidence base that can serve to tailor interventions aimed at safeguarding journalists and their work. Doing so requires us to examine the occurrence of a wide range of threats to a diverse community of journalists within a varied set of hostile environments. Importantly, it challenges us to explore how the multidimensional nature of risk to journalists should be measured." (Abstract)