Effects of Climate Change on Maize Yield in Iran: Application of Spatial Econometric Approach with Panel Data

In this study the impact of climate variables such as precipitation and temperature fluctuations and seed، urea and phosphate fertilizers on the yield of maize was studied in three different climate zones of Iran. For this purpose، Ricardian and spatial econometric models were used. The results showed the severity of climate change fluctuations، in all three climates، has been enough to identify as systematical risk factors. The results showed that، the extreme heat in the growing season of September، and lack of precipitation during the growing season (October) in warm climate zone were the main factors which caused decline in maize yield. In moderate climate، overheating during growing season (August) and harvest (October) considered as systematical risk factors. Also in the cold climate، heat in growing and flowering seasons (June and August) and harvest season (November) had negative effect on crop yield.