ing from correlation in spouse characteristics (assortative matching) allows us to isolate the implications for the optimal tax system of the interaction between spouses occurring through the social welfare function. In Section 4, we examine numerically how assortative matching affects our results. To establish an intuition on the optimal form of jointness, it is helpful to start by considering...

abstract level of groundwater is decreased which is mainly because, withdrawal of groundwater is increased, because of lack of right management. economics of rural based farming and farming is dependent of water so decreasing of groundwater effects social welfare. in this study decrease of welfare measure by reason of reduction of groundwater level considered. this study investigated the impact...

In this paper we consider production economic and cost related yield rate in a JIT (Just in Time) system. Based on the traditional EPQ (Economic Production Quantity) model, we establish the relation between cost and yield rate. The geometric programming approach is applied in our model to solve this optimizing posynomials problem. A numerical example is carried out to verify the proposed model....

This study proposes a new multi-item inventory model with hybrid cost parameters under a fuzzy-stochastic constraint and permissible delay in payment. The price and marketing expenditure dependent stochastic demand and the demand dependent the unit production cost are considered. Shortages are allowed and partially backordered. The main objective of this paper is to determine selling price, mar...

determination of shipment quantity and distribution problem is an important subject in today’s business. this paper describes the inventory/distribution network design. the system addresses a class of distribution network design problem, which is characterized by multiple products family, multiple warehouses and retail-ers. the maximum capacity of vehicles and warehouses are also known. the res...

one of the main factors affecting on the technical and economic performance of farms and livestock is the ability or capacity management. main goal of farm management is achieving specific performance, profitability and productivity; there for measurement management and performance in livestock farms are necessary. considering the necessity of increasing production and quality in the dairy indu...

production of meat and milk is important activities in agriculture of fars province. nitrogen and phosphorus excretion by cows can result in pollution of the environment and increased cost of production. shadow prices of two environmental outputs of 60 beef cattle farms in shiraz which were selected by random sampling method, are assessed using two-stage procedure; linear programming and stocha...

In this paper, an Economic Order quantity (E.O.Q) model with unit production cost, time depended holding cost, with-out shortages is formulated and solved. In most real world situation, the objective and constraint function of the decision makers are uncertainty in nature so the coefficients, indices the objective function and constraint goals are imposed here in fuzzy environment The problem i...

In this article the place and capacity of combined heat and power [CHP] prediction unit wasdetermined dynamically with use of modified particle swarm optimization (MPSO). It was done inoptimization palace and with a capacity of CHP as a production resource with the aim to increasethe reliability capacity. Decrease the loss and provide the electrical and thermal energies ofindustrial city. The f...