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...

This paper addresses the impact of information and communication technology (ICT) on sustainable transport by examining the direct application of ICT in urban transport. Following a discussion of various negative externalities of transport, the paper examines the extent to which existing and...

Knowledge Networks, which Roles for Regions and for Different Communication Modes? Marina van Geenhuizen and Holmer Doornbos This paper presents first results of a study on how knowledge networks of companies are structured and how these are used. It questions the idea that knowledge networks...

This paper fits into a new trend in empirical studies on agglomeration economies paying explicit attention to heterogeneity within innovative companies. The paper represents micro-level research, and is based on 21 in-depth case studies in a selected sample of young, innovative companies in the...

In the development of modern urban systems we are facing a shift from central cities as the major location of coordination functions, high-order services and innovative activities, to interconnected nodes at some distance in a larger metropolitan area. However, which cities in the emerging new...

Many decisions of mankind are rational only to a limited extent. This holds for individual travel behaviour, but also for long-range strategic decisions on transport systems or transport technology. In any decision problem coping with uncertainty is the most critical element. The introduction of...

A key assumption in agglomeration theory is that knowledge-based firms benefit from knowledge spillovers in cities. Cities however may have different locations in the national context, such as embedded in a network of nearby cities or relatively isolated. We examine social networks employed by...