A substantial number of studies have extended the work on universal properties in physical systems to complex networks in social, biological, and technological systems. In this paper, we present a complex networks perspective on interfirm organizational networks by mapping, analyzing and modeling the spatial structure of a large interfirm competition network across a variety of sectors and indu...

Science for the challenges of society. A substantial number of studies have extended the work on universal properties in physical systems to complex networks in social, biological, and technological systems. In this paper, we present a complex networks perspective on interfirm organizational networks by mapping, analyzing and modeling the spatial structure of a large inter-firm competition netw...

Many economists have observed that wealth is systematically lower in the tropics than elsewhere (Sala-i Martin, 1997; Nordhaus, 2006). Determining why this is remains a major puzzle. Leading hypotheses include, inter alia, the tropics’s disease burden (Gallup, Sachs and Mellinger, 1999), biota available for domestication (Diamond, 1997), distance from trading partners (Frankel and Romer, 1999),...

BACKGROUND The influence of socio-economic determinants on choice of infant male circumcision provider is not known in areas with high population coverage such as rural Africa. The overall aim of this study was to determine the key socio-economic factors which influence the choice of infant male circumcision provider in rural Ghana. METHODS The study investigated the effect of family income, ...

cities have hinterlands which depend on various factors such as economic power, population, distance and etc. tehran megalopolis has also numerous hinterlands .tehran as the capital city of the country is considered at the top of urban system hierarchy and has a very special place from economic, political, educational and etc. points of view. all these abilities cause a daily stream of people f...

BACKGROUND: Although the debate on the safety and women's right of choice to a home delivery vs. hospital delivery continues in the developed countries, an undesirable outcome of home delivery, such as high maternal and perinatal mortality, is documented in developing countries. The objective was to study whether socio-economic factors, distance to maternity hospital, ethnicity, type and size o...

Open flow network is a weighted directed graph with a source and a sink, depicting flux distributions on networks in the steady state of an open flow system. Energetic food webs, economic input-output networks, and international trade networks, are open flow network models of energy flows between species, money or value flows between industrial sectors, and goods flows between countries, respec...

Accessibility measures are useful for studies in Economic Geography. For example, accessibility to potential customers can be used in a study of firm behaviour. In such a study, it would be relevant to consider where potential customers live. This can be accomplished by splitting the accessibility measure into three parts: accessibility within the municipality, in other municipalities within th...

abstract:we define as south asian countries those countries that start with iran and end with bangladesh in asia. wethen use export statistics in terms of revealed comparative advantage (rca) for 14 industrial sectors tomeasure distances of export capabilities for these countries in relation to the “western” developed and eastasian countries. statistical methods such as multidimensional sca...

The important of the demographic dividend to East Asian economic growth is now widely recognized. During the last four decades of the 20 Century the working age populations grew much more rapidly than the dependent populations fueling growth in per capita income. Over the coming decades, however, demographic change is seemingly unfavorable. In the coming decades the working-age populations of m...