among the food products, grains play an important role in the consumption patterns of people, especially in the developing countries. since iran's main source of public dietary energy comes directly from grains, investigating and identifying the determinants of import of these products can be an important step towards food security. most experimental studies consider import of grains as only a ...

The clean energy transitions require a large volume of minerals to handle its diverse technologies, such as solar photovoltaics (PV), wind turbines etc. Therefore, mineral importing countries concentrated on cleaner production confront an uprising trend in critical prices due thriving demands. We quest for the response top countries' import demand from 1996 2019 within import-demand function an...

demand for consumption of protein, as a result of improvement in the income and nutrition levels, has a rapid growth in developing countries. broiler industry has a crucial role in providing protein. to design an optimal plan and to use the potential resources, analyzing cost structure of this industry is required. in this study, cost structure and economies of scale of broiler industry were an...