European Central Bank (ECB), European Central Bank (ECB), Ghent University - Department of General Economics, European Central Bank (ECB), European Central Bank (ECB), Nationale Bank van België, Deutsche Bundesbank, Bank of Estonia, Central Bank of Ireland, Bank of Greece, Banco de España, Banque de France, Bank of Italy, Central Bank of Cyprus, Latvijas Banka, Bank of Lithuania, Banque Centrale du Luxembourg, Central Bank of Malta, De Nederlandsche Bank and Austrian National Bank