“…For example, the CSES, which pools crosscountry survey data, did not offer factual knowledge questions until relatively recently. One approach to overcoming this hurdle is to rely on factual questions about the European Union (EU) from the Eurobarometer and European Election Study, both of which use the same format and type of question in each EU member state (Clark and Hellwig, 2012;de Vries et al, 2011;Karp et al, 2003;Tillman, 2012). This research has focused on explaining the effects of political knowledge on voting behavior (Arnold, 2012;de Vries et al, 2011;Hobolt, 2007) and public opinion (Anderson, 1998;Clark and Hellwig, 2012;Elenbaas et al, 2012;Karp et al, 2003;Tillman, 2012), providing few clues as to the macro-level conditions that affect the public's understanding of politics.…”