Metropolitan areas are often seen as suffering from negative externalities of a high density of activities and interaction. At the same time, high densities and a high variation of activities may contribute to a high level of innovation in urban activities. Various societal issues are addressed...

China׳s seaports belong to the largest in the world. The question is to what extent port infrastructure investment in China also contributes to growth of the regional economies involved, through mainly direct and indirect relations. We estimate the output elasticity of port infrastructure...