This paper estimates a dynamic model of the world markets for five nonrenewable resources over the period 1970-2004 and tests for market power in each of these markets. In particular, for each nonrenewable resource, we test whether the countries supplying the nonrenewable resource behaved as price-takers or oligopolists. The results show that during the study period the world markets for copper...

We formulate optimization problems to study how data centers might modulate their power demands for cost-effective operation taking into account three key complex features exhibited by real-world electricity pricing schemes: (i) time-varying prices (e.g., time-of-day pricing, spot pricing, or higher energy prices during ”coincident” peaks) and (ii) separate charge for peak power consumption. Ou...

The demand for advanced information services is growing in terms of both the number of users and the services to be supported. Voice and low-rate data services are insufficient for users in a world where high-speed World Wide Web access is taken granted. The trend is toward global information networks offering flexible multimedia information services to users on demand, anywhere, anytime. Poten...

demand is assumed constant in the classical economic order quantity (eoq) model. however, in the real world, the demand is dependent on many factors such as the selling price, warranty of product and marketing effort. in addition pricing and ordering quantity decisions are interdependent for a seller when demand for the product is price sensitive in the inventory models. these types of models a...

the infrastructure of the electricity grid and super grid system in the hitherto industrialized world was to a large extent built up in the decades following world war ii with a peak in investments around 1960-1980. this means that the flotilla of power transformers is now starting to reach projected lifetime of around 40 years. during the last couple of decades there has also been an ongoing d...

The objective of this study is to see the impacts of economic reforms and trade liberalisation policies on agricultural export performance of Pakistan. The major purpose is to examine the effects of both domestic supply-side factors and world demand on agricultural export performance. Four indicators of economic reforms and trade liberalisation policies are considered namely competitiveness, di...

The importance of drug as a valuable export product in the global economy becomes more clear every day. Understanding the problems of exports and factors affecting it, can be an important step to keep Iran’s position in the world markets and further export development of this product.In this study, Iranian pharmaceutical exports’ supply and demand functions were calculated using co-integration ...

Local bus network is the most popular transit mode and the only available transit mode in the majority of cities of the world. Increasing the utility of this mode which increases its share from urban trips is an important goal for city planners. Timetable setting as the second component of bus network design problem (network route design timetable setting vehicle assignment crew assignment) hav...