Depending on the assumptions that are made in new Keynesian models, one can attain different new Keynesian Phillips curves. In this study, three different new Keynesian Phillips curves and two different central bank behavioural functions are presented which leaves six new Keynesian DSGE models to study. The purpose of this study is the comparison of these six models and selecting the best model that fits to Iranian economy. The results show that the Phillips curve with both lagged inflation and expected inflation can be the best model in explaining the economy of Iran. Considering the formation of inflation in each period, it seems that the weight of lagged inflation is greater than the weight of expected inflation. The selected model forecasts a continuous recession during 1387, but the economy will be in expansion in 1388.
JEL Classification: E52, E58