The Theory demonstrates that oil price and volatility (OVX) are significant determinants of economic activity; however, studies seldom consider both variables in the oil–exchange rate nexus ignore distributional heterogeneity exchange rate. We investigate their joint effect employ quantile regression Markov switching models to address this. differentiate between positive/negative shocks control...

In the portfolio selection problem, the manager considers several objectives simultaneously such as the rate of return, the liquidity and the risk of portfolios. These objectives are conflicting and incommensurable. Moreover, the objectives can be imprecise. Generally, the portfolio manager seeks the best combination of the stocks that meets his investment objectives. The imprecise Goal Program...

This paper studies binary linear programming problems in the presence of uncertainties that may cause solution values to change during implementation. type uncertainty, termed implementation is modeled explicitly affecting decision variables rather than model parameters. The nature invalidates use existing models for this uncertainty. robust solutions obtained are optimal a worst-case min-max o...

In this article, we propose an explicit integer optimization formulation for the design of reliable and robust (to uncertainty in reliability data) sensor networks. The robustness is achieved by incorporating simultaneous occurrence of different kinds of uncertainty in the failure rate data in the optimization formulation. We show the use of constraint programming to solve these combinatorial p...

The theory of procurement auctions traditionally assumes that the offered quantity and quality is fixed prior to source selection. Multi-attribute reverse auctions allow negotiation over price and qualitative attributes such as color, weight, or delivery time. They promise higher market efficiency through a more effective information exchange of buyer s preferences and supplier s offerings. Thi...

This paper discusses conventional and unconventional monetary policies in a dynamic small open economy model with financial frictions. In the model, financial intermediaries or banks borrow from the world market and lend to domestic households. The external debt of banks is limited by a multiple of their equity; in turn, households hold equity in banks subject to a limit, reflecting domestic fr...

in this paper, based on error correction model by using panel data, an empirical analysis of demand for international reserves for 16 islamic countries is investigated. besides addressing conventional issues, the model explicitly incorporates the impact of expected export revenues and the impact of the exchange rate system on reserve demand. the results reveal that, short run money market diseq...

Currently, the supplier selection process is considered as an integral part of supply chain. The appropriate suppliers plays a preponderant role in performance chain it determines relevant aspects such cost management and flexibility most production processes. Background: It multi-criteria multi-objective problem because includes both qualitative quantitative factors. Method: To solve Supplier ...

We consider a problem faced by a procurement manager who needs to purchase a large volume of multiple items over multiple periods from multiple suppliers that provide base prices and discounts. Discounts are contingent on meeting various conditions on total volume or spend, and some are tied to future realizations of random events that can be mutually verified. We formulate a scenario-based mul...