This paper examines water challenges, a growing global concern with adverse economic and social consequences, and discusses economic policy instruments. Water subsidies provided through public utilities are estimated at about $456 billion or 0.6 percent of global GDP in 2012. The paper suggests...

We use several datasets to study whether son preference prevails in the human capital investment among Chinese rural-urban migrant households. We find that son preference exists among the rural migrants' households and that it caused lower probabilities relative to that of their boy counterparts...

Purpose: The purpose of study is to solve the multi-modal transportation routing planning problem that aims to select an optimal route to move a consignment of goods from its origin to its destination through the multi-modal transportation network. And the optimization is from two viewpoints...

Purpose: The purpose of this paper is to propose a mathematical model for the prediction of railway freight volume, and therefore provide railway freight resource allocation with an accurate direction. With an accurate railway freight volume prediction, railway freight enterprises can integrate...