Since March 1st of this year, euro banknotes and coins have been the sole legal tender in as many as 12 out of the 15 Member States of the European Union, i.e. for as many as 300 million people.
“Interstate Migration Has Fallen Less than You Think: Consequences of Hot Deck Imputation in the Current Population Survey,” NBER Working Paper Series 16536. Cambridge, Mass. : National Bureau of Economic Research, November. 10  BIS central bankers’ speeches  Kim, Soyoung (2001). “International Transmission of U.S. Monetary Policy Shocks: Evidence from VAR’s,” Journal of Monetary Economics, vol. 48 (October), pp. 339–72.