the study of short run and long run effects of trade liberalization on iran’s wheat import

abstract the present research accomplished to determination of the trade liberalization effects on import function of iran’s wheat crop using time series data from 1357 to 1387 that earn from sources such as agricultural and aerology statistics annual letter, customhouse and iran central bank website.in this investigation, at first, wheat liberalization index was measured by using level of international trade (lit) and then the effects of lit was evaluated on mentioned function.in order to checking short run and long run relations between function variables, utilize from auto regressive distributed lag (ardl) and method of error correction model (ecm).the estimate of wheat import demand function shows that when trade liberalization occurred, demand for import increased; this increase in long run is more than in short run. technology advance cause decrease in wheat import request in both long run and short run.