 A critical part of IOM's work is to utilize the available evidence base to inform publics about the dynamics and impacts of migration, both good and bad. This includes data on stocks and flows of migrants, as well as analytic assessments of emerging trends. The last edition of IOM's flagship world migration report is a key example of this, covering a broad range of topics from regional trends to violent extremism. IOM has two key tools to collect and operate on the basis of data, the Global Migration and Data Analysis Centre in Berlin and the Displacement Tracking Matrix.