In this study, the behavior of monetary and fiscal policy in the Iranian economy has been investigated during the period of 1360 to 1392 using Markov switching model. For this purpose, the monetary and fiscal policy rules has been used in which the growth rate of liquidity and the tax revenues are as instruments of the monetary and fiscal policies. The results from the likelihood ratio test show that both the fiscal and monetary policy rules in the Iranian economy follow a regime switching model.
Based on the results from the estimation of fiscal and monetary policies rules using a Markov switching model, the period of study divided into three periods in the years of 1360 to 1364, both monetary and fiscal policymakers have faced with passive monetary and fiscal policies, so that, they did not have an adaptive behavioral interaction with each other. During the years of 1365 to 1387, the Iranian economy has faced with the passive monetary policy but an active fiscal policy, So that, in this period, the monetary policymaker has no powerful reaction in adjustment of its policy instruments to increasing inflation at the same
time, increasing the outstanding debt of government decreases the tax
revenues and increases the budget deficit. Finally, in the period of 1388 to
1392, the policymakers follow the passive monetary and fiscal policies