The Effect of Macroeconomic Variables on Value-Added Agriculture: Approach of Vector Autoregresive Bayesian Model (BVAR)

There are different ideas and opinions about the effects of macroeconomic variables on real and nominal variables. To answer the question of whether changes in macroeconomic variables as a political tool is useful over a business cycle، understanding the effect of macroeconomic variables on economic growth is important. In the present study، the Bayesian Vector autoregresive model and seasonality data for the years between 1991 and 2013 was used to determine the impact of monetary policy on value-added agriculture. Predicts of Vector autoregresive model are usually divertaed due to a lot of parameters in the model. Bayesian vector autoregresive model estimates more reliable predictions due to reducing the number of included parametrs and considering the former models. Compared to the Vector Autoregressive model، the coefficients are estimated more accurately. Based on the results of RMSE in this study، previous function Nrmal-Vyshart was identified as a suitable previous disteribution. According to the results of the impulse response function، the sudden effects of shocks in macroeconomic variables on the value added in agriculture and domestic venture capital are stable. The effects on the exchange rates، tax revenues and monetary will bemoderated after 7، 5 and 4periods. Monetary policy shocks، in the first half of the year، increased the value added of agriculture، while in the second half of the year had a depressing effect on the value added.