European Central Bank (ECB), European Central Bank (ECB), European Central Bank (ECB), University of Wales, Bangor, European Central Bank (ECB), European Central Bank (ECB), Deutsche Bundesbank, European Central Bank (ECB), Banco de España, Bank of Italy, Banque Centrale du Luxembourg, Bank of Finland, Banque de France, Österreichische Nationalbank, European Central Bank (ECB), European Central Bank (ECB), European Central Bank (ECB) and Scuola Superiore Sant'Anna di Pisa - Laboratory of Economics and Management (LEM)

European Central Bank (ECB), European Central Bank (ECB), University of Wales, Bangor, European Central Bank (ECB), European Central Bank (ECB), Deutsche Bundesbank, European Central Bank (ECB), Banco de España, Bank of Italy, Banque Centrale du Luxembourg, Bank of Finland, Banque de France, Österreichische Nationalbank, European Central Bank (ECB), European Central Bank (ECB), Scuola Superiore Sant'Anna di Pisa - Laboratory of Economics and Management (LEM) and European Central Bank (ECB)