This dissertation is a collection of three essays that explore the transmission channels through which the monetary and the exchange rate policy affect the economy. Chapter 1 proposes and investigates the transmission channels through which the ECB's corporate sector purchase program (CSPP) exerted influences on the economy using a data set on the bond issuance and the syndicated loan in European countries. I find the direct effect of the ECB's bond purchase by substantially reducing the issuance spread of the CSPP-eligible bond by 21%. The direct effect led to an increase in the amount of bond issuance by 25% and a reduction in the bank loan demand by the bond issuers by 36% after the CSPP announcement. Moreover, I find the spillover effec...