harmful economic, environmental and financial impacts of fertilizer distribution through subsidies as well as its contradiction with regulations of wto, it makes necessary to adopt a new policy. in this study, by combining positive mathematical programming and maximum entropy technique, the impacts of cancellation of fertilizer subsidies and applying proposed direct payment policies on gross ma...

this paper using generalized roeger's model calculated the lerner index for iranian active industries in 4-digit isic codes during the period 1995-2007. the findings indicate that the lerner index has been between 8 to 16 percent in 38 industries among 131 ones. the index also in different industries shows that more than 50 percent of iranian industries have monopolistic power such that th...

to investigate the effects of deficit irrigation and different levels of nitrogen fertilizer on somequantitative and qualitative properties of melissa, a pot experiment was conducted for one year (2011) inmazandaran province. experiment was carried out as a factorial based on randomized complete blockdesign with three replications. irrigation treatments (25, 52 and 75 percent field capacity, fc...