We examine the impact of aid for trade (AFT) on bilateral trade costs of African Nations. Using a comprehensive bilateral trade cost data from Arvis et al. (2013) and focusing on AFT recipients in Africa spanning the years 2002-2010, we show that increased AFT reduces bilateral trading costs, more so for the recipient’s trade with each other than recipients’ trade with their donors. Despite dif...

this paper presents a multi-objective resource-constrained project scheduling problem with positive and negative cash flows. the net present value (npv) maximization and making span minimization are this study objectives. and since this problem is considered as complex optimization in np-hard context, we present a mathematical model for the given problem and solve three evolutionary algorithms;...

Our health care system is, in many respects, a victim of its own success. The rapid development of beneficial medical technology has produced a situation in which funding all interventions that would provide some health benefit to some patient would preclude spending on any other desirable social good.' As a consequence, there is an urgent need to make cost-benefit trade-offs in health care. -H...

Time–cost trade-off problem is one of the main aspects of project scheduling. Due to variations in the real world, usually, risks in estimation of project parameters are considerably high. Therefore, use of uncertain models, which is capable of formulating vagueness in the real world, to solve time–cost trade-off problems, gives a scheduling with more stability against environmental variations....

We examine South’s incentive to protect IPR in a North-South duopoly model where (i) the North firm owns a better technology and has the option of serving the South market via exports or FDI, and (ii) the South firm can invest in absorptive capacity to reduce the technology gap. While FDI by North firm makes absorption easier for South, investment in absorptive capacity by the South firm might ...

Time-cost trade off problem is one of the highly important issues in project accomplishment and has been ever taken into consideration by project managers. Time and cost as two critical objectives of construction project management, are not independent but intricately related. Time-cost optimization may be defined as a process to identify suitable construction activities for speeding up, and fo...

Natural selection optimizes an organism's genotype within the context of its environment. Adaptations to one environment can decrease fitness in another, revealing evolutionary trade-offs. Here, we show that the cost of gene expression underlies a trade-off between growth rate and mating efficiency in the yeast Saccharomyces cerevisiae. During asexual growth, mutations that eliminate the abilit...

This research paper adapts intelligent water drops (IWD) algorithm to solve the discrete timecost-quality trade-off problem (DTCQTP) in software projects which is never solved before by this algorithm. Project manager's goal is getting an optimal allocation of time, cost and quality of each task/activity in the software project such that total time and cost of the project is minimized while pro...

Trade execution is concerned with the actual mechanics of buying or selling the desired amount of a financial instrument. Investors wishing to execute large orders face a tradeoff between market impact and opportunity cost. Trade execution strategies are designed to balance out these costs, thereby minimising total trading cost. Despite the importance of optimising the trade execution process, ...

Trade-offs between traits such as fecundity or survival are fundamental to much of our understanding of the evolution of life histories. There has been much renewed interest and controversy concerning methods for estimating trade-offs, in the wild or in captivity, and with or without experimental manipulations. In this paper, we assess the general question of the utility of modern capture ± rec...