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How should we measure the impact of investigative journalism? Media scholars and practitioners have turned their attention towards understanding the causal effect of media reports on a range of social, political and economic outcomes. Their interest has been spurred by the increased availability of data, by the emergence of new tools for rigorously assessing causal effects and by pressure from donors interested in understanding the returns on their investments in media and journalism programmes. Drawing on literature from multiple disciplines, we propose a multi-faceted metric which future researchers, journalists and news agencies will be able to use when analysing media impact.

International audience ; Subjects change frequently in moderated debates with several participants, such as in parliamentary sessions, electoral debates, and trials. Partitioning a debate into blocks with the same subject is essential for understanding. Often a moderator is responsible for defining when a new block begins so that the task of automatically partitioning a moderated debate can focus solely on the moderator's behavior. In this paper, we (i) propose a new algorithm, DEBACER, which partitions moderated debates; (ii) carry out a comparative study between conventional and BERTimbau pipelines; and (iii) validate DEBACER applying it to the minutes of the Assembly of the Republic of Portugal. Our results show the effectiveness of DEBACER.