this paper using endogenous growth models based on research and development, has investigated two economic relations in three groups of countries included developed countries, developing countries and a mixed group of both mentioned ones. at first, the effects of r&d; activities on patent growth have examined and then the relation between volume of patent and growth rate in these groups has sur...

housing has been a major challenge for the rising population of countries during last decades and the provision of affordable standard house for low and middle-income households has always been at the forefront of sustainable development strategies and plans, especially in developing countries. besides, the need to high-density housing systems due to rising population has become a central issue...

In the editorial by Dr. Reza Afshari “What is the best research for low income countries” (1), some important issues have been raised, highly relevant to developing countries. In most developing countries including India, emergency medicine is not well established and clinical toxicology is even further a low priority in view of both research and clinical management. The number of poison contro...