“…First, we are the first to use net issues of cash of all national euro area central banks to analyze the relationship between cash demand and the shadow economy within a currency union. Up to now, these net issues are only investigated for individual countries (see Bartzsch et al, 2013;Rua, 2018), for other currency areas like the US (see Judson & Porter, 2000, ch 6.4) or, instead, currency (banknotes) in circulation is used (see Herwartz et al, 2016;Klovland, 1984). Second, we distinguish between large and small countries as well as between large, medium and small denominations.…”