The long run equilibrium relationship analysis By Using Unit root tests and Autoregressive Distributed Lag Approach (ARDL)


The objective of this study is to analyze the long run equilibrium relationship between the production of rice in Iraq and its cultivated area used and its purchasing price by Iraqi government over the period 1971-2010. To reach this objective the following are applied:1.Use the unit root test individually in order to specify the stationary and the order of integration to each time series individually.2.Apply Cointegration test by using the Autoregressive distributed lag (ARDL) approach to test the long run equilibrium between the variables .And result of this study :Some of the variables are Stationary in level (integrated of order zero I(0)) and other variables are Stationary in first difference (integrated of order one I(1)).2.Existence of a long run equilibrium relationship between variables, which means that the long- run coefficients are stationary irrespective of whether the underlying regressors are I(0) or I(1) .