European Central Bank, Bank of Greece, Bank of Finland, Deutsche Bundesbank, Bank of Latvia, De Nederlandsche Bank, Bank of Italy, Bank of Portugal, European Central Bank (ECB), European Central Bank (ECB), Banco de España, Deutsche Bundesbank, Cyprus University of Technology, Bank of Greece, De Nederlandsche Bank - Research Department, Croatian National Bank, European Central Bank (ECB), Bank of Italy, Národná banka Slovenska, National Bank of Denmark, Bank of Portugal and Banco de España