Investigating the Sudden Changes in the Money on the Welfare cost of Inflation in Iran

The present study examines between inflation and prosperity for the Iranian economy in the Q1 1367 - Q1 1399 and its nonlinear relationship with increasing money with the Markov switching approach. For this purpose, using a standard method that was followed by Lucas (2000), Ireland (2009) and Mogliani and Urga (2018), two demand functions with full logarithm and semi-logarithmic specification are estimated. The results indicate a nonlinear relationship between the volume of money and the cost of inflation. Also, at the interest rate, 10% of inflation welfare costs for a complete logarithm model in the diet of 0.75% GDP in the diet were two 0.67% GDP and in the diet of 0,78% GDP. And for the semi-logarithmic model in the diet, 0.039% of GDP in the diet is two 0.036% GDP and in the diet of 0.031% GDP. In addition, an orientation in monetary policies and increasing the volume of money caused instability in the performance of money and the cost of inflation.