"measuring social welfare resulting of iran, s suger imported tariffs comported to an export tax policy in brazil using a game theory approach "

sugar, including processed goods in the world in the raw material for the production of agriculture and it is a strategic commodity. the intent of this research is to approach the game theory to analyze the relationship between import and export of sugar, iranian and brazil. the impact of changes in world prices and import tariffs, the welfare of the brazilian study. the data used in this study during the period 1981-2012. after peforming the required test, the desired function through a system of simultaneous equation(3sls) were estimated. the result of calculating welfare in the context of game theory suggest, 22 percent increasein in world prices and reduction tariff rote of 10 percent, resepectively, brazil and iran to the welfare surplus equal to 795/4 of dollar to brazil and -194 $ for iran will follow.