the water and waste-water industry, as an infrastructure industry, has wide interactions with the public by having more than 20 million subscribers (27 million units). one of these interactions is the collection of debt considering the nature of the obligation sales and service rendered. collection of debt and the costs imposed as a result of the qualitative and quantitative services offered to...

theoretically and empirically, it has been often argued that production uncertainty affects the farmers’ production efficiency. insurance can play an impactful role in reducing the uncertainty and, consequently, increasing the investment. using multilevel models, we examined the effect of agricultural insurance programs on investment in the agricultural sector of khorasan razavi province. the c...

one of the most important policies concerning the adjustment of foreign trade is to allocate foreign currency by establishing an exchange control system. the mechanism of this would be so that the central bank operates or supervises all transactions concerning foreign exchange. however, the controlling system, like all other international systems of payment, operates with some adjustments and i...