In this paper I use a medium scale open economy DSGE model developed by Baksa, Benk and Jakab (2010) for the Hungarian economy. This model provides a notable degree of disaggregation both on the government revenue and expenditure side, being able to capture the shocks that come from fiscal policy decisions. My contributions can be summed up in the following three actions. First of all, I estimated the model for the Romanian economy, using Bayesian techniques. Secondly, I determined the parameters of fiscal feedback rules in order to establish if the automatic stabilizers work properly. And thirdly, I tried to analyze the impulse response functions in order to assess the effects of different fiscal policy measures on the most important macroeconomic variables.