The Nonlinear Impact of Factors Affecting the Output of Iran’s Manutacturing setor: Threshold Approach

According to the structure of industry in Iran’s economy, there are plenty of factors affecting the output of this sector. Present study has investigatedthe nonlinear effect of exchange rate, producer price index, interest rate, energy consumption and physical capital on industrial production using Threshold Model and quarterly dataover  the period 1990 to 2014. Consequently, two extremes of the threshold are estimated at 4% and almost zero percent, two structural breaks with three regimesareobtained, and the production index of Iran’s industrial firms has been chosen as the threshold variable. If the growth of the industrial production index of the current season is negative or close to zero, then the economy is in the first regime (stagnation). The positive real growth of the industrial production index leads the economy to the second and third regimes )boom).Results indicate that energy consumption and physical capital have a positiveand significant impact on the industrial production in the all regimes. Exchange rate has a negative effect in twolowregimesand it is insignificant in the high boom regime. Interest rate has anegative impact on the industrial production  (reduce the industrial production)  just in the stagnation (low regime). Finally, the Producer Price Index (PPI) has a positive impact on the production of industrial firms only in the boom period.