International audienceThe paper explores (former) transition economies, Poland, Czech Republic, Slovakia and the Republic of Serbia, concerning abandonment of the exchange rate targeting and fixed exchange rate regimes and movement toward explicit/implicit inflation targeting and flexible exchange rate regimes. The paper identifies different subperiods <br />concerning crucial monetary and exchange rate regimes, and tracks the changes of specific monetary transmission channels i.e exchange rate channel, interest rate channel, indirect and direct influences to the exchange rate, with variance decomposition of VAR/VEC model. The empirical results indicate that Polish monetary strategy toward <br />higher monetary and exchange rate flexibility...