Purpose – This paper describe the development of the fuzzy logic model approach to supply chain and its value for managers by illustrating its application to supplier performance appraisals. Design/methodology/approach – Measuring supplier performance possesses the properties of multi-dimension and multi-scale, it increases the complexity of the aggregation and assessment process. A focal compa...

This paper studies the robust optimization for the single allocation p-hub median problem under discount factor uncertainty. We develop the discount factor as a novel uncertain parameter, which represents different connection modes between hubs. The discount factor can be described by a random variable with discrete distribution in nominal case. We apply a robust optimization approach to deal w...

With the widespread use of manufacturing philosophies such as Just-In-Time (JIT), emphasis has shifted to the simultaneous consideration of cardinal and ordinal data in supplier selection process. Traditionally, many optimization models of supplier selection assume that the average prices of related expenditures are constant. This is far beyond the real situation. In fact, suppliers usually off...

The main goal of the present paper is to analyze the effects of currency collapses (a large devaluation of country’s nominal exchange rate) on real gross domestic products of six Asian countries (Iran, Indonesia, Malaysia, Pakistan, South Korea, and Turkey). A yearly data is collected from the WDI of the World Bank over the period 1980-2011. The econometric model includes the real GDP growt...

With the real exchange rate elasticity of processing net exports being positively related to the processing trade intensity, the modified Marshall-Lerner condition states that a real exchange rate appreciation tends to increase rather than reduce net exports, as long as the composite export elasticity with respect to import via the real exchange rate is sufficiently large. The estimated cointeg...

‎This paper proposes a multi-supplier multi-product inventory model in which the suppliers have unlimited production capacity, allow delayed payment, and offer either an all-unit or incremental discount. The retailer can delay payment until after they have sold all the units of the purchased product. The retailer’s warehouse is limited, but the surplus can be stored in a rented warehouse at a...

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...

We study financial fragility, exchange rate crises, and monetary policy in an open economy version of a Diamond-Dybvig model. The banking system, the exchange rate regime, and central bank credit policy are seen as parts of a mechanism intended to maximize social welfare; if the mechanism fails, banking crises and speculative attacks become possible. We compare currency boards, fixed rates, and...