“…While most of the providers of original in-house coding (LIED, Polity, V-Dem) use multiple sources (which are generally unspecified), only CIRI makes use of the Country Reports on Human Rights Practices issued by the US State Department. 8 This fact means that the validity to a very high degree depends on the representativeness and impartiality of a single source, which has been accused of being biased-especially in the early releases (see Innes, 1992;Poe, Carey, & Vazquez, 2001;Qian & Yanagizawa, 2009). 9 In the next step, raters can introduce random and systematic measurement errors by interpreting the sources differently, either because they based their evaluation of different pieces of relevant or irrelevant information, because they weight the same evidence differently, or because they have different understandings of concepts and scales guiding the coding process.…”