We examine the issue of possible portfolio diversification benefits into seven Middle-Eastern and North African (MENA) stock markets. We take the standpoint of the world investor and we construct portfolios in international and local currencies based on five optimization models and two risk measures. We then compare the portfolio out-of-sample performance based on Sharpe and Sortino ratios thro...

Although the HIV pandemic is witnessing a decline in the number of new infections in most regions of the world, the Middle East and North Africa (MENA) has a rapidly growing HIV problem. While generating HIV data has been consistently increasing since 2005, MENA’s contribution to the global HIV literature is just over 1% and the existing evidence often falls behind the academic standards. Sever...

The purpose of this paper is to investigate the levels of technical efficiency in agricultural sector of MENA countries by using Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) approaches in 2007-2008. The results show that the total average of technical efficiency is as follows: DEABCC(0.770)>DEACCR(0.744)>SFA(0.479), and among all MENA countries, the best performanc...

f rom the viewpoint of economic theories, total factor productivity (tfp) is the most important component that leads to economic growth and development. the main purpose of this study was to evaluate the impact of knowledge-based economy on total factor productivity in the member countries of the middle east and north africa (mena) region. for this purpose, the panel data regression analysis ha...

Most studies that examine CO2-neutral, or near power systems by using energy system models investigate Europe the United States, while similar for other regions are rare. In this paper, we focus on Middle East and North Africa (MENA), where weather conditions differ substantially from those in Europe. We use a green-field linear capacity expansion model with over-night investment to assess effe...

Mammarian enabled (Mena), a member of the Enabled (Ena)/Vasodilator-stimulated phosphoprotein (VASP) family of proteins, has been implicated in cell motility through regulation of the actin cytoskeleton assembly, including lamellipodial protrusion. Rac1, a member of the Rho family GTPases, also plays a pivotal role in the formation of lamellipodia. Here we report that human Mena (hMena) colocal...

5 Miguel Valencia, Mario Chavez, Julio Artieda, J. Paul Bolam and Juan Mena-Segovia 6 7 1 Neurophysiology Laboratory, Neuroscience Area, CIMA, Universidad de Navarra, Pamplona, Spain 8 2 Institute du Cerveau et de la Moelle Epinière, Hôpital de La Pitié-Salpêtrière, Paris, France 9 3 MRC Anatomical Neuropharmacology Unit, Department of Pharmacology, University of Oxford, 10 Mansfield Road, Oxfo...