introduction: market power is an important factor affecting welfare. existence of market power on the purchase side reduces supplier welfare. however, existence of market power on the sales side reduces supplier welfare. some believe that the agricultural market structure is a monopoly. in fact, most of the agricultural products can be purchased by small firms and then delivered to consumers be...

interest rate ad valorem tariffs are considered as the most prominent trade tools extensively used in the framework of spatial equilibrium models (sems) to analyze agricultural and food trade policies around the world. however the results obtained from such models have been criticized because of their inadequacy in producing any observed data within the base period. hence a positive spatial and...

in recent years, iran has experienced high level depreciation of the nominal exchange rate (ner). the ultimate effects of such depreciation on iranian families’ welfare and income distribution have been a challenging issue among policymakers and researchers. accordingly, this study evaluates the economic effects of ner depreciation on the rice market, using spatial price equilibrium model. the ...

the aim of this paper is to examine and analyze the spatial distribution of population in cities of the southern coastal region of iran by using common models and techniques in the field and to study the trends of evolution in a time period of 40 years (1345-1385). models used in the study can be classified into three main groups. the first group is the primate city indexes (including jefferson...

Spatial models of two-player competition in spaces with more than one dimensión almost never have pure-strategy Nash equilibria, and the study of the equilibrium positions, if they exist, yields a disappointing result: the two players must choose the same position to achieve equilibrium. In this work, a discrete game is proposed in which the existence of Nash equilibria is studied using a geome...