In Data Envelopment Analysis the distance from the best practice frontier can be interpreted as the economic performance of sample units. In the present paper this distance is used as an efficiency measure to correct the weighted average of non-substitutable subindicators of infrastructure endowment.

The objective of this study is to calculate and decompose productivity incorporating multi-environmental pollutants in Chinese industrial sectors from 1992 to 2008. We apply a weighted Russell directional distance model to calculate productivity from both the economic and environmental performance. Main findings are, 1) Chinese industrial sectors increased productivity, with the main contributi...

let $g$ be a connected graph with vertex set $v(g)$‎. ‎the‎ ‎degree resistance distance of $g$ is defined as $d_r(g) = sum_{{u‎,‎v} subseteq v(g)} [d(u)+d(v)] r(u,v)$‎, ‎where $d(u)$ is the degree‎ ‎of vertex $u$‎, ‎and $r(u,v)$ denotes the resistance distance between‎ ‎$u$ and $v$‎. ‎in this paper‎, ‎we characterize $n$-vertex unicyclic‎ ‎graphs having minimum and second minimum degree resista...

Present paper is an attempt to estimate the impact of Economic and Geographic indicators in trade among Islamic countries according to a bilateral trade model as Gravity model, and study the relationship between Economy, Geography and Trade in this way. Fixed effect version of the panel data estimation producer with OIC member country data spanning over the 2007–2012. The result of this researc...

One of the aims of spatial political management is to increase access to social and economic services to all residents in an area in order to enhance their satisfaction. There is a great space in the action that has a broad scope.  If the spatial political organization implemented in a country is unable to organize such services in a condensed manner, it will face reduced efficiency and la...