Output growth in the U.S., a commodity-importing country, increases its demand for imports of commodities and therefore commodity prices, which benefits commodityexporting countries but has adverse effects on commodity-importing countries. Hence, in the data, U.S. output is more positively correlated with outputs of commodity-exporting countries than commodity-importing countries. In other word...

We consider the Commodity constrained Split Delivery Vehicle Routing Problem (CSDVRP), a routing problem where customers may request multiple commodities. The vehicles can deliver any set of commodities, and multiple visits to a customer are allowed only if the customer requests multiple commodities. If the customer is visited more than once, the different vehicles will deliver different sets o...

In this paper we consider a class of economies with a ̄nite number of divisible commodities, linear production technologies, and indivisible goods, and a ̄nite number of agents. This class contains several well-known economies with indivisible goods and money as special cases. It is shown that if the utility functions are continuous on the divisible commodities and are weakly monotonic both on ...

present study, compares iran's agricultural products competitiveness power with mena's countries during 1995-2011. for accomplishing mentioned goal, first, agricultural commodities export and import indices calculated for each one of twenty countries of mentioned region and then revealed comparative advantages index of agricultural commodities trade calculated. results showed that iran had comp...

Multi-commodity rebalancing plays a critical role before and during the attack of large-scale disasters. In practice, some relief centers can be out reach from ground for vehicles due to road disruption. Accordingly, alternative transportation systems are essential maximize fairness minimize total time, simultaneously. However, little study has reported on this issue humanitarian logistics. To ...

The pooling problem is a nonconvex nonlinear programming problem with numerous applications. The nonlinearities of the problem arise from bilinear constraints that capture the blending of raw materials. Bilinear constraints are well-studied and significant progress has been made in solving large instances of the pooling problem to global optimality. This is due in no small part to reformulation...